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Calcium hardness is the measurement of dissolved calcium in the water. For swimming pools, calcium hardness should be maintained at a minimum of 200 mg/l (ppm). Low levels can harm the pool and its equipment. Test the calcium hardness level of the pool water and if it is below 200 mg/l (ppm) use All Swim Pak 3 to increase the level.
** Please Note: This is a Hazardous Chemical and will incur an additional £30.00 hazardous goods delivery surcharge at checkout, Charge is once per delivery and not per product**
*Can you confirm whether you live in Wales?
We are only able to supply Hot Tubs, Endless Pools & Swim Spas in Wales.*