PROBLEM
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POSSIBLE CAUSE
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REASON
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SOLUTION
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PRODUCT REQUIRED
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Cloudy Water
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Build up of dirt & bather pollution
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Ineffective chlorine levels or poor filtration
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Backwash filter, then shock treat. Add clarifier to polish water.
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Start of Algae growth
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Insufficient levels of chlorine
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Shock treat. After 24 hours backwash filter. Maintain chlorine level above 1.5ppm. Prevent re-occurrence of algae growth
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Chlorine ineffective
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Over stabilisation
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Dilute pool water and shock treat
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Ineffective filtration
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Filter blocked or filter media needs renewing
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Check filter media or cartridge
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See ineffective filtration for more detail
(bottom of page) |
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Suspended particles
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Precipitation of salts due to high pH or high alkalinity
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Correct pH and/or alkalinity
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||
Unpleasant Water
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High combined chlorine's
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Free chlorine levels too low
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Dilute pool water and shock treat
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|
Eye Irritation
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Detergents from cleaning compounds getting into pool water
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Reaction between chlorine and detergent
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Use chlorine compatible cleaners
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Sore eyes / throat
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Water too acid / alkaline
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pH too low / pH too high
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Correct pH / Correct pH
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Chlorine level difficult to maintain
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Sunlight destroying chlorine
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Chlorine not stabilised
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Use stabiliser or stabilised chlorine
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Build up of pollutants
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Insufficient chlorine
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Shock treat
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||
High water temperature
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Organisms multiply more quickly
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Increase dose of sanitizer
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||
No chlorine reading despite adding chlorine
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Chlorine level may be too high
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High chlorine level bleaches reagent in test tablet
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Allow chlorine to reduce naturally over a period of time
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pH too low
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low pH of local water supply
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Insufficient alkali
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Add alkali - ideal pH 7.2 - 7.6
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Use of acidic chlorine donors
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Insufficient alkali
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Add alkali - ideal pH 7.2 - 7.6
|
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pH too high
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High pH of local water supply
|
Insufficient dry acid
|
Add dry acid - ideal pH 7.2 - 7.6
|
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Use of alkaline chlorine donors
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High alkalinity
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Reduce alkalinity to 125ppm check pH
|
||
Salts being leached from new concrete pools
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Self correcting over a period of time
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Add dry acid - ideal pH 7.2 - 7.6
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pH erratic
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Insufficient bicarbonate to buffer pH
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Low total alkalinity
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Add bicarbonate - ideal 125ppm
|
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pH locked
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Too high a level of bicarbonate
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Topping up from mains water can increase alkalinity in hard water areas
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Reduce alkalinity to 125ppm check pH
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Low alkalinity
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Bicarbonates reduced by dilution, particularly in soft water areas
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Mains water has low levels of bicarbonates
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Add bicarbonate minimum 75ppm, consult All Swim
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Pool walls feel slimy
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Algae growing
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Insufficient chlorine
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Shock treat to kill algae, sweep and vacuum pool. Prevent recurrence with algicide, brush pool walls
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Dirt on pool wall at water level
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Build up of fat, oil & cosmetics
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Irregular cleaning of surfaces
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Clean with sponge & suitable detergent
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Sharp edges around tiles
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Grout being leached by water
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Water too soft
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Re-grout pool. Increase calcium levels to minimum 175ppm. Consider changing to HTH
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Ineffective Filtration
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Incorrect sand level in filter
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Not enough sand to filter out particles
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Renew and/or top up sand
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.
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Correct level of sand
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Blocked filter / filter sand
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Backwash & use filter aid
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Cartridge filter in poor condition
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Filter allowing particles through
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Renew Cartridge
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Your most commonly asked questions answered.
Swimming Pool TroubleshootingHow to solve common problems with your pool.
Looking After Your Pool and Hot TubsHow to keep your pools and hot tubs in top condition.
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