Hot Tubs

Questions To Ask Before Buying A Hot Tub

Choosing the right Hot Tub is bound to raise many questions, such as the running costs or how easy it is to maintain for starters.

With such a vast amount of hot tubs on the market, it can be a challenge to figure out which brand and model is the right choice, particularly if you’re researching tubs online and some deals seem almost too good to be true.  Our recommendation is to make sure you research the brand and always try to view the tub in person or arrange a ‘wet test’ to experience the tub in action!

Based on our experience in helping customers find their perfect hot tub, we’ve compiled a list of the most commonly asked questions during the decision-making process:

 Q.   How are hot tubs delivered and what preparation do I need to do beforehand?

A. The first thing to consider is how accessible the site is, but worry not as All Swim offer a free, no-obligation site check to establish if standard delivery is possible.  We’ll check access to the property right through to where you plan to have your hot tub and advise if any specific preparation aside from the standard concrete base and electrical supply is required.

A full guide regarding the, preparation and delivery guidelines can be viewed here: https://www.allswimltd.com/pdf/AllSwim-SpaPreDelivery.pdf

All Swim include the full Delivery, Positioning & Commissioning (set-up of the spa) on all Caldera Spas where access permits and the Fantasy Spas range currently have a free Kerbside delivery included.  If access is tricky, delivery can usually be made possible via a Hi-ab – which typically costs around £300.

So, all that’s needed is for you to prepare the site:-

The proper foundation (or base) is a reinforced concrete slab at least 4” (10cm) thick and needs to be completely flat and level.

With regards to electrics, Fantasy Spas hot tubs can either be hardwired or connected via a C Form socket (16 amps supply recommended to run both heating and jets simultaneously) whereas Caldera Spas hot tubs require a dedicated supply run from the main unit to an RCD. Once your electrician has installed the RCD and left the sufficient amount of armoured cable, our engineers are qualified to do the final connection on the day of delivery.

Q.    How much will it cost me to run a hot tub?

A. This depends on a few factors; how well made and insulated the hot tub is, the quality of the cover and how you use the tub.  Our range of Caldera Spas hot tubs feature a special FiberCor Insulation that has 4 times better heat retention properties than traditional hot tub insulation foam, keeping running costs down as the water temperature is maintained more efficiently. 

Based on an average daily use of one hour, running costs are approximately £1 per day.

Q.  I’ve seen tubs online that look similar but are a lot cheaper, what’s the difference between them?

A. In a nutshell, if you compare two hot tubs that are similar in size and appearance, but with a sizeable price difference, the cheaper one will have been made from cheaper materials and components and by a less skilled manufacturer.

Unfortunately, there are many cheap, poorly manufactured hot tubs available to buy, particularly online, that have inadequate insulation, cheap jets and an inferior build quality – which result in high running costs and costly ongoing maintenance/repair work being needed in the long term.

 Check the warranty terms and conditions before making your decision also – this is a great indicator of a hot tub’s build quality!  For example, if you’re considering a deal that seems like a bargain but has a short warranty length, that suggests the manufacturer realistically doesn’t expect the spa to get past the warranty length without needing replacement parts or potentially expensive repairs.  Or the worst case scenario of a manufacturer that goes out of business during the warranty period – leaving you high and dry if anything goes wrong!

All Swim has many years of experience and is a hot tub retailer with over 48 years in business plus Watkins Wellness (who manufacture all our spas) are part of the MASCO Corporation, a Fortune 500 company required under US law to hold separate funds to cover the entire warranty length of all spas they make – which considering some models have a 10 Year warranty is pretty reassuring.

Q. Will a Hot Tub be difficult to look after?

A. The main thing any first-time hot tub owner needs to master is maintaining the correct water balance.  This involves testing the water to check the level of sanitiser (usually Bromine or Chlorine, which keep the water free of bacteria and safe) along with the pH.  A chemical starter pack (supplied with all our Hot Tubs) contains handy ‘dip strips’ for easy water testing and the products needed to adjust the levels to keep within the recommended ranges and takes just minutes to do.  Part of the All Swim commissioning service involves showing you how to test the water and treat the water, then it’s simply a case of remembering to regularly follow the steps and adjust accordingly for clear, safe water.

Your hot tub should be pretty easy to look after once you’re familiar with water balance.  BISHTA recommend draining the spa water and refilling it every 10 -12 weeks, depending on usage and the water treatment system on the tub.  Aside from this, the user manual supplied is a handy guide to help understand your hot tub and we’re always on hand to answer our customer’s questions! 

One of our previous blog posts covers looking after a hot tub in more detail: https://www.allswimltd.com/how-to-look-after-your-hot-tub

If you’re considering purchasing a hot tub and would like to have a chat, please get in touch with us either via email (sales@allswimltd.com), call us on 02920 705059 or call in to the showroom and we’ll be happy to help.

A Winter Guide For Hot Tub Owners

As a Hot Tub owner, you probably have your own pattern of how and when you prefer using the tub, maybe a half-hour session daily, or a few hours with family and friends over the weekend. Whichever way you choose to use your hot tub, providing your spa comes from a reputable, quality manufacturer, hot tubs are designed for use all year round.

There are many benefits to hot tub ownership during autumn and winter, from enjoying a festive toast in the tub to watching Bonfire Night fireworks from the warmth of your spa. And not forgetting a key one - the hydrotherapy benefits that will help to ease stiff muscles and improve circulation to combat winter woes.

If you’re new to hot tub ownership or considering purchasing one in time for this winter, here are some commonly asked Questions & Answers you might be wondering about:

Q. Won’t I get too cold getting into and out of the hot tub when it’s freezing outside?

A. We would advise popping a robe on when on the way to and from the tub and suitable footwear, along with pre-checking the access route is free from ice, so your walkway is clear and safe. Aside from that, when using the hot tub, your skin temperature actually increases close to that of normal body temperature and remains at that temperature for a short while after getting out of the water – making the exit from the tub less of a temperature shift until you’re back indoors.

Q. Will it cost more to run my hot tub in colder temperatures?

A. If you have purchased a well-made, well-designed hot tub, such as one by US manufacturer Watkins Wellness who manufacture our Caldera Spas, they are purposely designed to be used daily all year round. Caldera Spas feature a special type of insulation (FiberCor) that is 4 times denser than traditional hot tub insulation foam (so 4 x better at retaining the heat), helping to greatly minimise running costs.

Always fully remove your cover when using the hot tub (for safety reasons), and keep it fully on and secured when the tub is not in use to keep the heat in. Replace the cover as soon as possible as the greater difference between air and water temperature will result in faster heat-loss from the water in winter.

Q. Will my hot tub require more maintenance during the winter?

A. Not necessarily, as they are designed to withstand harsh winter climates. However, it pays to pay attention to your hot tub when the temperature drops for a few reasons:

  • If it snows, we advise sweeping the snow off the hot tub cover, as a pile of snow is heavy and will add unnecessary strain on the cover and cover lifter if you have one.
  • Even if you don’t plan on getting in, it’s advisable to put your hot tub on periodically during the winter to check everything is operating as it should. This is because a spa is designed to have heated water circulating with built-in protection against the water freezing in the pipework. However, if something fails to operate properly and is not picked up, there is a risk of the water heating and circulation stopping and freezing inside the pipework leading to interior damage.
  • Maintain your water testing and treat the water as you would normally do, which is always recommended best practice.

Q. If I don’t plan on using my hot tub during the winter, do I need to winterise it?

A. If you have decided you won’t be using your spa over the winter period, you will need to follow the below steps to properly winterise it to protect the equipment from frost and potential damage:

Winterising (shutting down) your Hot Tub

  1. 1. Switch off the air control valves and open all jets.

    At this stage it would be a good idea to use a proprietary pipe cleaner and A hot tub flush product before draining the hot tub, which removes built-up biofilm and bacteria from pipework.

    Drain the water from the hot tub, using the hot tub’s in-built drain valve or a submersible pump (which will empty it out much faster). There will normally be a few inches of water left in the bottom of the hot tub which can be bailed out using a plastic bucket or similar plastic container.

    Switch off power to the hot tub both at the local isolator switch (if fitted) and the MCB in the consumer unit.

  2. 2. Remove the cabinet panel at the front of the hot tub’s equipment bay. Undo the unions connecting the pipework to the pumps and allow the water in the pipework drain away.

    Use a wet and dry vacuum cleaner to clear the pipework of any remaining water. If the hot tub is fitted with an air blower, disconnect the end of the pipe from the blower, and suck as much water as possible from the blower lines with the wet and dry vacuum.

    Remove the drain plugs from the pumps and let the water drain from the pump bodies. When all the water has drained from the pump bodies, replace the drain plugs.

  3. 3. Replace the cabinet panel.

    Wipe over the hot tub’s interior and exterior with a clean cotton or microfibre towel. When it has fully dried out, place the cover back on the hot tub, close it and secure it.

  4. 4. Cover up the Hot Tub

    As the hot tub is not going to be used for a while, it is better to cover it up properly to protect it from the elements, dirt and insects. you are ready to use it again. A Spa Protector Cover will help shield the cover and cabinet from harsh conditions also, until

    5. You have now successfully winterised your hot tub!

    For any help or advice on looking after your hot tub, feel free to contact us on 02920 705059 or email sales@allswimltd.com for assistance.


The All Swim Glossary Of Hot Tub Terms

Caldera Utopia Spas hot tubsChoosing your Hot Tub can (and should) bring up lots of questions. With so many options to choose from, how do decipher what features you will benefit most from, or indeed what the feature even means exactly?

  • Why do some tubs feature Ozone?
  • What is an Air Blower for?

The list goes on. So we’ve put together a nonsense-free, simple Glossary of the most common Hot Tub features and terminology – so you can easily understand and identify the key features you want in a tub.

A is for Air Blower

Hot Tub jets typically use a mixture of water and air to produce a massage effect. An Air Blower is a separate motor from the pump motor, which works by pushing large volumes of air through specific jets. The Air Blower can be turned on or off using a dedicated control, which produces a bubbling effect for a lighter type of massage than water-only massage jets.

Bear in mind that the use of an Air Blower will offer a variation in the massage effects, but the air will also have a cooling effect on the air (impacting energy costs due to the call for heat).

B is for Balboa

A familiar name that will come up frequently in the world of Hot Tubs. Balboa is the name of Balboa Water Group, who are recognised as one of the industry leaders in the production of hot tub control panels and topsides. One thing to consider, Balboa control panels alone do not determine the overall quality of a hot tub (as they can easily be retro-fitted to a wide range of tubs), so if you are considering a tub featuring Balboa controls, be sure to check out the full details and warranty information of the tub and the manufacturer.


A popular sanitiser for use in Hot Tubs which is an alternative to chlorine and works exceptionally well at high temperatures.

C is for Cover & Cover Lifter

Lifestyle Coverlifter ProLift IIA well-fitting rigid insulation cover will maximise heat retention in your tub and although not essential, a cover lifter makes taking the cover off and replacing it easier and protects the cover.


A sanitiser that is available in either stabilised or unstabilised forms. Stabilised chlorine is a slow release sanitiser and comes in granular or tablet form whereas unstabilised chlorine (known as Shock) quickly raises the level of sanitiser to kill off bacteria – ideal for treating fresh water or when sanitiser levels have dropped too low resulting in less than desired water quality.

D is for Diverters

The ability to divert power between seats in your hot tub is very useful; for example if there are only 2 of you sat in a 6 seater, diverter valves allow you to turn off the power to the empty seats, diverting it to the area of the tub being used.

Or for those times when you’re enjoying chatting but no longer need your massage jets on – you can just turn your jets off and remain in the tub.

E is for Energy Efficiency

One of the most frequent questions people ask when browsing our tubs is ‘How much is it going to cost me to run?’ A key question indeed. Caldera Spas models are designed to be highly energy efficient, through a combination of features such as the unique FiberCor insulation (on Caldera Spas) and EnergyPro circulation and heating system.

Realistically, monthly running costs come in at around £30-35 per month based on around 7 hours use per week.

F is for Frogs

A set of cartridges that sit within your Caldera Spas tub (in a built-in hidden compartment) that look after your water quality. The mineral cartridge softens the water while the Bromine cartridge delivers a constant level of sanitiser keeping your water clean and safe. Fully adjustable so you can increase or decrease the level as needed.


Used to reinforce the acrylic shell once it is removed from the mould.

Filter Cycles

The programmed time period when the hot tub water filtration comes on (e.g. twice a day at 12 hourly intervals).

G is for Ground Preparation

When planning the location for your hot tub, be sure to properly lay the correct foundation. A concrete slab is the ideal base, measuring 4 inches (10cm) in thickness and it should be completely flat and level.

H is for Hot Tub Circuit Therapy

Hot tub circuit therapy, the Caldera Spas differenceNot the type of ‘circuits’ you may have experienced in the gym – but a way more relaxing circuit. Caldera Spas have designed their tubs to encourage the bather to spend time in every seating position, resulting in a full body hydrotherapy massage that targets every muscle and stress point.

No more lounger-hogging!

I is for Insulation

One feature that appears across all 3 Caldera Spas ranges is the FiberCor Insulation, which is 4 x denser than traditional hot tub insulation foam. This makes it 4 x better at both heat retention with an added bonus being a quieter operation when the tub is on.

J is for Jets

Not all jets are created equally, and quantity doesn’t always equal quality! We recommend wet-testing any hot tub you are considering purchasing. Even if the exact model can’t be tested, trial a model from the same range or manufacturer.

Caldera Spas models all feature jets exclusive to Caldera, as they have created their own series of jets based on providing the highest quality of massage benefits for the user.

K is for kW (heater size)

The output measurement of a heater, usually ranging from 2-3kw in a hot tub. The higher the kW output the quicker your hot tub water will heat up, with average heating time around 12-18 hours from scratch.

L is for Loungers

An angled seat that enables you to recline in the hot tub. Some tubs feature one or multiple lounger seats whereas others offer more seats by not having a lounger at all.

M is for Music

Some tubs feature in-built music systems allowing you to Bluetooth music from your chosen device. Caldera Spas offer the option of having music or not in their tubs, so customers have the choice (great for when you already have an outdoor music system setup!).

N is for ‘No Flow’

An indicator that water is not flowing through the hot tub pump. Refer to your manual or contact your retailer for advice.

O is for Ozone

Although you will always need to use some form of sanitiser to kill off and prevent bacteria in a hot tub, it’s helpful having something that reduces the amount of chemicals required. Caldera Spas feature Monarch CD Ozone, which mixes ozone bubbles into the water as it travels through a special contact chamber - neutralising contaminants and reducing the need for additional sanitiser. A key benefit of the Monarch CD form of ozone is that it does not contain a UV light that needs regular replacement to remain effective.

P is for Pumps

The pump is what drives water up through the pipework and forces it out via the jets. Smaller hot tubs typically have 1 pump (driving up to 30 jets or so). Larger tubs will usually have 2 pumps.


The measure of acidity or alkalinity above the neutral pH of 7.0. Anything below 7.0 is considered acidic and above is alkaline. For hot tubs your pH should be maintained between 7.2 – 7.6.


Parts per million is the measure of concentration of a chemical.

Q is for Quality Assurance

Purchasing a hot tub is a big decision, so naturally you’ll want to feel confident in the quality of both the tub itself and the retailer. Some key points to look for are the Warranty details of the tubs, the reputation of the manufacturer and the company selling the tub.

Similarly, buying a tub from a manufacturer who has been in operation for a long time is a good sign of quality – such as Caldera Spas who have been creating quality tubs for over 40 years. A good quality manufacturer will be reflected in the warranties they offer on their tubs also.

R is for Rotomolded

DreamMaker rota moulded hot tubsRotomolded hot tubs are solid, one-piece tubs that are extremely durable and rotationally constructed from plastic. Due to the one-piece construction, these tubs are very strong, lightweight and will never rot, rust, chip or crack. Also a cheaper option than traditional tubs. Why not view our rotomolded DreamMaker and Fantasy Spas hot tub ranges?

S is for Sanitiser

This is what keeps the water clean, safe and free from bacteria. The most commonly used options are bromine or chlorine.

T is for Test Strips

A simple method of testing your hot tub water; a strip is dipped into the water then by reading the colours against the colour coded chart on the bottle to identify any action you need to take to balance the water.

U is for Underwater Lighting

Many tubs feature LED underwater lighting which can enhance the ambience in your hot tub.


An exclusive massaging system featured in some of the Utopia models by Caldera Spas, the user can select a variety of massage sequences to fully customise the hydrotherapy massage.

V is for VersSage

A powerful jet featured on the Paradise and Utopia ranges by Caldera Spas that can be adjusted to provide a variety of massage effects. The more you angle the nozzle, the wider the path of rotation.

W is for Watkins Wellness

The US organisation currently the global leader in producing hot tubs founded in 1977. Part of the MASCO Corporation – a Fortune 500 company listed on the New York Stock Exchange. Watkins manufacture two leading hot tub brands; Fantasy Spas rotomolded tubs and all three ranges by Caldera Spas (Vacanza, Paradise and Utopia).

X is for ‘X’-Display Deals

It’s always worth checking if there are any deals to be had on ex-display models as sometimes it can result in a real bargain.

Y is for You Time

A major benefit in owning and using your hot tub is having time dedicated to relaxation and stress relief. Regular hot tub use is proven to decrease stress and tension and to promote muscle recovery along with general wellbeing.

Z is for Zzz's

How does hot tub use improve sleep quality? Spending time in water temperature raises core body temperature. When you exit the tub, the resulting drop in your body temperature signals it’s sleep time to the brain, setting you up for a better quality night’s sleep.

Caldera Spas Hot Tubs, A Unique Hydrotherapy Experience

Discover the Caldera difference for yourself

Caldera Spas Lumbarssage massage seatWith such a bewildering array of hot tubs on the market place it can be a little daunting as a first time buyer (or even a second or third time buyer looking to upgrade) to make a choice that’s going to be right for you, after all, hot tubs are a luxury purchase for most of us and it’s important to know you’re choosing one that’s going to offer something unique and give you the best possible experience for your money.

That’s where we think our Caldera Spas, and in particular our Utopia range, sits head and (soothed) shoulders above the competition. This incredible range of hot tubs includes an industry redefining approach to total body restoration through hot tub circuit therapy.

So what is Hot tub circuit therapy?

Well, hot tub circuit therapy is a bit like having a personal trainer in the gym. A personal trainer helps you create a plan that’s designed to move you from station to station with different exercises to give your body a balanced, full body workout helping to target all the major muscle groups.

Just think of your Caldera Spa as a personal hot tub therapist with each seat and position individually designed to provide a deep, relaxing massage for different muscle groups. Instead of sitting in one position like you would in most hot tubs our Caldera Spas encourage you to use the whole hot tub for relaxation. As you move around the spa the invigorating jet design and layout focuses on individual muscle groups, from neck and shoulders through to the large muscles of your back, lower back and even down to your hamstrings, calves and feet - often overlooked regions of the body when it comes to other hot tubs but if you spend most of your working day stood up you’ll really appreciate this aspect of the hot tub circuit therapy experience!

What's different about the hydrotherapy jets on Caldera Spas

The design and layout of the jets on any hot tub is the crucial element to your experience as a user and you won’t find a greater attention to detail or such a meticulous focus on the quality of the hydrotherapy experience than on our Caldera hot tubs. Each area of the hot tub has been specifically designed to target a particular muscle group and here are the massage clusters that will really help ease those aching muscles and gently soothe those tensions away.

Caldera Spas hydrotheray massage jets


Featured on either the seat or lounger, this targets your neck, shoulders and middle back.

Atlas Neck Massage

A contoured pillow that cradles your head while specialised, above the water line jets focus on your neck and shoulders.


Multiple jets focusing on the large muscles in your back. Importantly, some models feature jets that target wrists and calves.


A unique jet configuration that helps relieve tension and pain in your back’s lumbar region.

Euphoria Jets

These jets provide a deep, penetrating massage to your thighs, knees and calves and feet and you’ll enjoy two of these incredible feature jets in most Utopia models.

Hip Jets

These jets work on this often overlooked stress point and helps re-invigorate movement in this area of your body.

Angled Calf Jets

Working on the often overlooked muscles in your lower leg, perfect for those who spend most of the working day stood up.

Sole Soothers

Jets that stimulate and revive the muscles in your feet that help relieve the tension in the area of your body that bears your full weight all day.

The proof really is in the testing

Hopefully this brief glimpse into the most important features of our Caldera Spas has given you a valuable insight into the attention to design detail that these hot tubs offer, they really are a cut above the rest. But don’t take our work for it, we have a complete range of Caldera hot tubs, including the fabulous Utopia series, on display at our award winning showroom here in Cardiff. Why not arrange a visit? Our trained, knowledgeable sales staff are always on hand to help you explore this unique range of hot tubs and understand the benefits of hydrotherapy massage and we also have changing facilities on site so you are always more than welcome to book a wet test to try them for yourself. Be warned though, every customer that has tried these incredible hot tubs has made a purchase. That is surely proof enough of the Caldera difference!

How To Look After Your Hot Tub

My New Hot Tub Has Arrived – What do I do now?

Hot tub commissioning with All SwimAssuming you purchased your new hot tub from a reputable supplier, you will have benefitted from having it properly installed and commissioned as part of the delivery service. A part of that service likely included having the hot tub filled with water and treated with chemicals, and a demonstration of how to use the control panel to operate the tub properly.

Great as that is, many new hot tub owners find it a little tricky at the beginning to maintain proper water balance and in the day to day operation and maintenance of the tub - in fact we always tell our customers we expect to be on hand to answer any questions or concerns in the post-delivery first few weeks!

Getting To Know Your New Hot Tub

As with any new item, it always pays to spend some time at the start familiarising yourself with the operating instructions. That way, you can enjoy using your tub as and when you want to – minus the headache of frantically scanning the user manual trying to figure something out at the last minute, when you’re expecting guests (haven’t we all been there at some point?!)

Some of the common queries we receive from new tub owners include:

Why Is My Hot Tub Not Heating Up?

The first thing to double check if you encounter a problem with your hot tub not heating up is the operating mode the tub is set on. Hot Tubs typically have three modes; Standard, Economy and Sleep (or Ready and Rest depending on the manufacturer). Here’s a brief explanation of what each mode means:

Standard: In standard mode the set temperature will be reached and consistently maintained.

Economy: In this mode the heater will only come on when the tub is in one of its standard filter cycles (typically for 1.5-2 hours twice a day, morning and evening) if the temperature is below the set temperature. Economy is ideal for daily users.

Sleep: Working on the same principle as Economy mode, but in Sleep mode the drop in temperature usually has to be 10 degrees below the set temperature for the heater to kick in during the filter cycle. Sleep mode is most commonly used when going on holiday or periods of absence where nobody will be using the tub.

I’m Struggling To Maintain Correct Water Chemistry

The most common query we receive by far from new hot tub owners is due to cloudy or murky water along with how much of each chemical they should be adding and when. And it’s no surprise, as there is a lot to get to grips with, particularly if you have never owned a hot tub before! High usage and being unfamiliar with water testing and chemical dosing are the usual causes of incorrect water chemistry during the first few weeks.

Some tips we offer are to get in the habit of regularly testing the water using the testing strips in your chemical starter pack. This will help you to understand when the water is calling for higher levels of sanitiser or pH adjusters etc, and it’s a habit that will save you stress and money over time.

Did you know that the ideal time to add sanitiser is after use, not before? This way, the sanitiser gets to work straight away on cleansing and cleaning the water – whereas if left until the following day, bacteria has had a whale of a time already starting to multiply overnight – beat it at its’ own game!

Factors that will increase the need for sanitiser are users not showering prior to use or removing make up (fake tan loves to make a filter cartridge work hard too). So, it’s a good habit to adopt from the start asking bathers to rinse off before using the tub – you could even get a little sign printed if you don’t like asking, or forget to ask.

Keeping a close eye on your pH level is important too, as if the water becomes too acidic or alkaline it can make for an uncomfortable user experience, and take its toll on the hot tub equipment.

What Do I Need To Do With Spa Frogs?

Spa Frog bromine and mineral cartridges Our range of Caldera Spas have in-built water care courtesy of a Bromine Spa Frog cartridge and Mineral Frog cartridge. One is prefilled with Bromine to sanitise the water, reducing the need for sanitiser top-up dosing by up to 50% and the other with minerals, which condition the water for a softer feel.

You control how quickly these are administered into the water via a simple dial on the cartridges, allowing you to increase or decrease the level as needed (ideal for a weekend away, simply turn up the dial for automatic Bromine sanitisation!)

Frequency of changing Spa Frog cartridges depends on how you set the dials, and changing the cartridges is straight forward; ensure all jet pumps are turned off before opening the cap of the in-built housing compartment. Turn the handle counter-clockwise and lift the holder up and out before setting the dial on the new cartridges and inserting them into the holder. Secure them back into place by pushing the compartment down and twisting it clockwise, then close the cap.

How Often Should I Change The Water?

BISHTA guidelines recommend changing the water in your hot tub at least every 3 months, more frequently in the case of high usage.  This will help to ensure optimum water quality and protect both bathers and the hot tub equipment.

Top Tip; Prior to emptying your tub, it is recommended to use a ‘flush’ such as Hot Tub Flush to thoroughly clean all of the internal pipework, removing debris and any bacteria lurking within.

Changing Filter Cartridges

As a guide, your filter cartridges should be removed and cleaned every 2 weeks or so, depending on usage. This can be done either by soaking them overnight in a cleaning solution like our Blue Horizons filter and cartridge cleaner or by using an instant solution eliminating the need to soak like the All Swim instant filter cleaner following the usage instructions on the label. New cartridges should be replaced approximately every 6 months.

Cleaning The Hot Tub

Hot tub commissioning with All SwimRegularly cleaning the surface of your hot tub will help keep the exterior in tip-top shape and help minimise scratching or marking the acrylic shell, while keeping it looking great. Surface cleaners such as our Lo-Chlor Spa Shield are great for polishing up the surface of the shell, simply combine with a soft microfibre cloth to buff the shell, taking care not to get the product in the water. When changing the water, take advantage of that time to give the entire shell a clean before you refill with fresh water to keep it looking good as new (just ensure there is no residual product on the surface before refilling.)

You’ve Got It Sussed!

Hopefully the above tips will prove useful when it comes to taking care of your hot tub and you can also find more information on our Frequently Asked Questions page that may be of interest. For any queries or areas of concern, if in doubt, check it out with your supplier or give us a call on 02920 705059 for further help and advice.

What Size Of Hot Tubs Are Available?

Caldera Spas Aventine hot tubDo you love the idea of having a hot tub but wonder if there is one to fit your space? We get it, once you start looking around and visiting showrooms the sheer size of hot tubs in real life can be overwhelming, especially if you’re limited on space.

Hot tubs in all shapes and sizes

At All Swim we stock a large selection of Hot Tubs ranging from 2 to 8 seaters to suit a wide variety of customer needs and spaces.

Short on space? Our most compact 2 seater hot tub is the Caldera Spas Aventine which measures 1620 x 1620 mm and is specially designed to fit snugly into a corner. And the cleverly designed 3 person Kauai features the UltraMassage Lounger which delivers a powerful, adjustable full body massage alongside 2 seats facing each other.

Or maybe you’re looking for a larger-than-average hot tub – in which case the 8 person Cantabria by Caldera Spas offers the ultimate in customisable massage and comfort – complete with a state of the art design.

Hot tub circuit therapy, the Caldera Spas differenceWe have a range of all-seated hot tubs too that comfortably seat 7 people, ideal for large families or entertaining friends.

Find the right fit

A question we are often asked when customers visit our Cardiff showroom is "How big are the hot tubs you have?" Getting the measurement of hot tubs is naturally a factor in choosing the right one, so to make it a little easier we have compiled a chart showing the measurements and weights of every hot tub we stock along with useful information on everything you need to consider before buying a hot tub.

Did you know that we also offer a free site visit? This can be helpful for checking the access for delivery and offering advice regarding positioning and which model could best match your needs, and there is no obligation to purchase if you decide not to!

Whatever size and style of hot tub you have in mind, our aim is to help you find the perfect choice. For more information on any of our hot tubs by American manufacturers Caldera Spas, Fantasy Spas or DreamMaker, you can get in touch with us by calling 02920 705059 or via our online form.

Alternatively you can view our entire range of hot tubs online. 

Caldera Spas sizes


Utopia Series Dimensions
L x W x D
Weight kg
Weight kg*
Cantabria 2740 x 2310 x 970mm 595 3,560 2,325 40
Geneva 2260 x 2260 x 970mm 455 2,485 1,550 40
Niagara 2260 x 2260 x 970mm 450 2,535 1,525 40
Tahitian 2130 x 2130 x 910mm 410 2,315 1,425 40
Tahitian AMS 2130 x 2130 x 910mm 410 2,315 1,425 40
Florence 2130 x 2130 x 910mm 395 2,235 1,360 40
Provence 2130 x1980 x 890mm 395 1,715 1,005 40
Paradise Series Dimensions
L x W x D
Weight kg
Weight kg*
Makena 2260 x 2260 x 910mm 465 2,445 1,500 40
Salina 2260 x 2260 x 910mm 455 2,615 1,600 40
Martinique 2260 x 1930 x 860mm 420 2,320 1,500 40
Kauai 2130 x 1650 x 750mm 335 1,450 875 16
Vacanza Series Dimensions
L x W x D
Weight kg
Weight kg*
Palatino 2260 x 2260 x 980mm 415 2,420 1,525 20
Marino 2130 x 2130 x 910mm 380 2,235 1,375 16
Vanto 2130 x 2130 x 910mm 385 2,370 1,425 16
Capitolo 2080 x 2080 x 840mm 330 1,905 1,175 16
Celio 2130 x 1650 x 760mm 290 1,355 825 16
Aventine 1620 x 1620 x 740mm 225 960 575 20

* Filled weight includes the weight of the occupants assuming an average weight of 80kg each


Fantasy Spas sizes


Fantasy Spas Dimensions
L x W x D
Weight kg
Drift 1730 x 1600 x 810mm 129 841 13 or 16
Embrace 1830 x 1830 x 790mm 137 776 13 or 16
Entice 2190 x 1960 x 840mm 172 890 13 or 16
Splendor 1980 (diameter) x 860mm 163 984 13 or 16
Aspire 1830 x 1190 x 710mm 113 435 13 or 16


DreamMaker Spas sizes


DreamMaker Spas Dimensions
L x W x D
Weight kg
Fantasy 1980 x 1680 x 810mm 120 700 16
EZ Spa 1980 x 1730 x 810mm 129 795 16
EZ L Spa 1980 x 1730 x 810mm 147 795 16
Odyssey 2080 x 2080 x 810mm 154 1022 16
Big Ez 2080 x 2080 x 810mm 154 1022 16
Dream 600L* 2030 x 2030 x 910mm 179 1080 23
Cabana 1 pump* 2030 x 2030 x 860mm 190 1190 20
Cabana 2 pumps* 2030 x 2030 x 860mm 190 1190 25
The UK Pool & Spa Awards 2017

Awarding excellence in the Swimming Pool, Swimspa and Hot tub industry

Michelle Dewberry at the UK Pool and Spa Awards 2017Well, another year is fast approaching an end and it’s time for companies in the Pool and Spa industry to start reflecting on their achievements over the past twelve months and plan for the forthcoming new season. Every company hopes to build on the completion of successful swimming pool and hot tub projects year on year, improve customer service levels and make valued improvements to the overall buying experience. It’s also nice to know that those continued efforts in a business are implemented effectively and that the improvements are recognised by both customers and industry peers alike. No industry awards ceremony reflects those efforts better than the UK Pool & Spa Awards.

Now in it’s seventh year the UK Pool & Spa Awards has continued to grow bigger and better year on year and has seen an overwhelming demand for entrants with 31 award winning opportunities now on offer. The competition is open to the entire water leisure industry across multiple disciplines including swimming pool designers, swimming pool installers, hot tub and swim spa manufacturers together with retailers and wholesalers. Entering these prestigious awards is an opportunity for any company to raise their profile amongst industry leaders and customers alike.

Simply entering these awards isn’t a guarantee of success though. Each entry is judged by both a public and private vote with 40% of the overall vote being cast on-line by the general public and 60% being judged by a specially selected panel consisting of industry representatives and professionals from around the globe. If you’re going to put yourself forward for an award there aren’t many places to hide unfortunately!

As ever, we’ve continued to work hard to make improvements to the business over the last year and decided that the categories best reflecting our efforts for reward were Spa Retailer of the Year, Pool Retailer of the Year, Pool Showroom of the Year, Pool & Spa Showroom of the Year and Website of the Year. That’s 5 in total, hopefully everyone else agreed with our opinions on the improvements we had made!

So began the anxious wait for the award results at The Vox Conference Centre, Resorts World, Birmingham. As ever, the turnout was impressive with many leading industry figures present including a special guest appearance from Michelle Dewberry, a broadcaster, business woman and winner of the second series of the BBC’s, Apprentice. Our first chance to settle the nerves came with an informal networking session with major suppliers within the swimming pool, swimspa and hot tub industry followed by an introduction to the award entries and the companies looking to take home some awards. The competition was as strong as ever and winning an award was going to be an achievement this year.

Pool and Spa Showroom of the Year 2017 awardAfter a few inspirational words from Michelle on the role of technology and young women in business together with an insightful look at the pool and spa industry and the repercussions of the Brexit vote by the UK Pool & Spa Awards event organiser it was time to announce the winners. First awards category and our first entry, Website of the Year. There were some well deserved Business Award winners in this competitive field but we were stunned to be collecting our first win so early in the evening, a Gold Standard Award for the All Swim website. A great start! Next came the Commercial Pool and Project Awards with some stand out winners in the Luxury Pools and Hot Tub and Spa of the Year Awards. Finally, the Prestige Awards and the remainder of our four entries, let’s hope we followed on from our early success. Pool Showroom of the Year was announced as another Gold Standard Award for All Swim, followed by Winner of the Pool and Spa Showroom of the Year and amazingly, 2 more Gold Standard Awards for Pool Retailer of the Year and Spa Retailer of the Year. What an incredible end to an exciting evening of events, an award in every category we entered!

Jane Veysey, company director remarked:

“It’s unbelievable to receive so many awards at the UK Pool & Spa Awards this year, they are always genuinely unexpected as the competition is always very tough. I would just like to thank all of our customers for their continued support and to my team of staff who help make my business a success with their hard work and commitment.”

Here’s to another year of continued improvements at All Swim and another successful year of business in 2018, we hope you will all continue to support us as a business and enjoy the continued improvements we consistently make to our products and services.

What To Look For In A Hot Tub

Our guide to buying hot tubs

There are a bewildering array of hot tubs and spas on the UK market and it can be confusing knowing which spa is going to be the right choice for you and your family. Thankfully All Swim have done a lot of the hard work for you. We’ve been in the swimming pool and hot tub industry for over 45 years and our hot tub expertise will help you make the right buying choice.

Choosing the right hot tub for you

Should I research hot tubs online?

The fabulous Caldera Cantabria in their Utopia series

The hot tub market in the UK is growing every year. According to Nick Clamp, owner of What Spa? magazine, feedback from retailers and manufacturers has the current UK ownership at nearly 300,000 households. Joining this growing market is certainly an exciting prospect, but do some research online and find out why people are choosing a hot tub lifestyle. What exactly is it going to offer you and your family? Decide what are the important factors in wanting an outdoor hot tub and read hot tub reviews and comments from other owners online. Researching our range of Caldera Spas will also give you a good indication of why they offer more for your money compared to other manufacturers.

Be warned though, that a great deal online may be too good to be true. It’s always better to view hot tubs or spas before you buy them. If the hot tub you’ve decided to buy online has an inferior build quality, cheap jets and pumps or sub standard cabinet and cover insulation you’ll probably end up with a spa that costs you more to run and repair than you expected. It’s also important to check that the product has official CE marking. An abbreviation of the French phrase ‘Conformité Européene’, it means ‘European Conformity’ and indicates to government officials that the product can be legally placed on a country’s market place and safeguards consumers best interests. A hot tub is likely to be a long term investment and should provide you and your family with years of entertainment, make sure you understand the quality of your preferred hot tubs by visiting a reputable hot tub showroom like All Swim.

Is how a hot tub made important?

There are many different manufacturing processes involved with building hot tubs and if there’s a difference in price, there’s likely to be a difference in the build quality. Look carefully at a hot tub retailer’s website. You should be able to find plenty of information on their products, technical specifications and warranty details. Pay particular attention to the level and type of insulation used in your hot tub, our Caldera hot tubs utilise a revolutionary new loose, wool-like fibre called FiberCor® insulation - with four times the density of traditional urethane foam (used in most hot tubs) it has vastly improved insulating efficiency and fills all voids and gaps in the hot tub compartment. With a better insulated cabinet you will be spending less time heating your hot tub water, and that translates to lower running costs which, most consumers would agree, is an important consideration for purchase. It’s also important to look at the quality of the rigid cover supplied with your hot tub. Most of the heat loss will occur on the surface of the water so a strong, full-foam insulated cover with a durable, marine grade vinyl will help you reduce your running costs. Also check the cover has skirts on all sides of the hot tub when it’s closed as this will ensure the very best thermal seal.

What size hot tub should I choose?

Hot tubs are available in many different shapes and sizes. Your first consideration should be how much space you have in your garden and how many people are likely to be using your new hot tub. If you have a big family or like having friends around regularly for parties then you will probably need a larger hot tub with multiple seating positions. Be careful though, how much access you have at your property will also be a consideration for delivering your new hot tub. Don’t worry though, All Swim offer free site surveys so if you’re unsure of anything we are happy to advise.

It may sound obvious but always try and sit in a new hot tub in a dealer’s showroom, hot tubs look very different from the outside than they do sat in them! Visiting your local hot tub showroom with family or friends will allow you to try them on for size. Pay particular attention to the size of the foot well and the ergonomic design of the seating positions. A hot tub may specify a large array of seating but if it comes with a small footwell you’re likely to be struggling to fit everyone into your new hot tub!

What is hot tub hydrotherapy?

Discover the Euphoria jet features in the Utopia range

Hydrotherapy is a term used to describe the use of water for pain relief and treating illness. Water is a great way to soothe aching joints, help relax and reduce stress levels. The design, configuration and quality of hydrotherapy jets in your hot tub is probably the most important aspect of your new hot tub purchase, you’ll want to ensure you’re getting the best possible massage for your money. Caldera hot tubs differ to any other on the market with the introduction of their unique Hot Tub Circuit Therapy. Similar to the approach used by personal trainers, a Caldera Spas hot tub treats individual muscles with strategically placed jets and purposefully designed seats throughout the hot tub itself, moving you from station to station helps deliver a full body workout and intense all over massage.

Do I need help looking after my hot tub water?

Buying a hot tub is an important decision to make but proper care and maintenance of your water can be just as important. Well maintained spa water will ensure you and your family are safe and you will help prolong the life of your hot tub. Buying cheap hot tubs online or from large high street retailers may save you money in the short term but you could be left to make costly water balance mistakes on your own. All Swim ensures you have ongoing support from our trained staff and helpful advice on correct water balance tips if you ever need them.

Our Caldera spas have also been purposefully designed with you, the end user, in mind. The integrated spa frog system takes a lot of the work out of dosing your hot tubs water correctly and the Utopia and Paradise series feature Monarch CD Ozone systems that naturally kill bacteria helping reduce the cost of chemical sanitisers.

We will always provide an informative introduction to your new hot tub with our delivery, positioning and commissioning service. Our trained spa engineers can talk you through the set up of the hot tub and answer any questions you may have on looking after the water on the day your hot tub arrives.

How important is a good hot tub cover?

Hot tub covers are key to retaining heat on your hot tub

p>Most of the heat lost from the water in your hot tub will occur from the surface so a well designed, efficient hot tub cover is a great asset. Caldera hot tub covers are designed to be energy efficient, meeting the most stringent energy standards established by the California Energy Commission for portable spas. Keeping your hot tub covered when not in use will not only ensure you spend less money heating the water but it will also prevent airborne debris entering the hot tub water and adversely affecting the water quality.

Can I play music in my hot tub?

Absolutely! If music is an important aspect of your hot tub lifestyle then our Caldera Spas won’t disappoint. Almost all models across the Utopia, Paradise and Vacanza ranges are available with a fantastic bluetooth enabled music system, a few clicks and your smart phone, tablet or laptop can be synchronised effortlessly with your hot tub.

Can I spread the costs of a hot tub purchase?

Yes you can. All Swim have always put the customer first and our finance packages will help you spread the payment costs and ensure you find an affordable hot tub to suit you and your family’s budget. We can offer 12 and 24 months interest free credit at 0% APR or a 60 month finance option at 4.9% APR. You can even apply for finance online today!

The Surprising Benefits Of Using A Hot Tub

Muscle massage relief with Caldera SpasUsing a hot tub is a proven method of enhancing health and wellbeing, with benefits including better sleep, physical and mental relaxation and detoxification to name a few. But how exactly does the experience of using a hot tub help?

The Science Bit

Most people attribute a hot tub session with relaxing tense muscles and pain relief, which are certainly key benefits of using a tub, but did you know the benefits run deeper than just relaxation?

The warm water temperature reduces the gravitational pull of the body and dilates blood vessels, reducing pressure on your heart – fantastic for stress reduction and improved blood flow.

The high temperature water also encourages your body to sweat out stored impurities, so it’s a great boost for detoxing your body and helping to reduce the appearance of cellulite.

Those suffering from arthritis will find the hydrotherapy massage on our Caldera Spas a great relief from their symptoms due to improved blood circulation, allowing for easier movement and pain relief.

Feel-good endorphins are naturally released by the body during a hot tub session too, which can reduce anxiety and promote feelings of calmness.

Social Interaction

With today’s hectic lifestyles and our growing tendency to spend time on our gadgets, spending all important quality time with family and friends can prove a challenge.

Hot tub owners have the advantage of using their hot-tubbing time to socialise with their nearest and dearest, helping to nurture relationships and step away from screen-time. They might also notice an increase in visits from friends once the hot tub arrives!

Long Term Gains

If you’ve never owned a hot tub before, the initial cost might be something you are questioning – as let’s face it, it’s not an every-day essential purchase.

At All Swim we offer a range of hot tubs, designed to suit a wide range of budgets and needs, as we believe the benefits of hydrotherapy should be widely available to all. If you're considering the hot tub lifestyle but are a little unsure as to whether you'll use it regularly our inflatable hot tubs are a great way to get started, all the benefits of a hot tub at a fraction of the cost! Alternatively, if budget is a consideration but you're looking for a hot tub you can use all year round, consider our Fantasy Spa range, durable, portable and offering all the comforts of a more expensive spa. And lastly, if you're looking for the ultimate in comfort, style and hydrotherapy massage experience our Caldera Spas will not disappoint!

Whether you’re a regular gym user or not, using a hot tub at home will help you achieve your health and fitness goals, as the massage from the jets is strong yet gentle, allowing you to work your muscles in a low impact environment.

The Caldera Spas Utopia series light showOwning your own hot tub is like having your very own personal wellbeing retreat, making a staycation an appealing alternative to pricey spa getaways.

Add Value to your Home

Seeing as we’re not blessed with year-round fine weather in the UK, it’s fair to say most of us don’t make great use of our outdoor space during autumn and winter. The addition of a hot tub makes being outdoors more inviting – just imagine toasting the New Year in under the stars together in your hot tub!

Or maybe you’d prefer your tub to be indoors? Either way, it can add value to your property if in time you choose to move on and include the hot tub as a feature.

Not sure where to begin? For expert advice or a free, no obligation site visit contact us on 02920 705059 or email e-mail sales@allswimltd.com.

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Directors: A.J & J.L Veysey | Company registration no: 1061642 | VAT no: GB133 4078 90