Pool water hardness products

Water hardness is a key factor in the balance of your pool. If it's too low, it can cause corrosion of equipment; if it's too high, it leads to limescale deposits and cloudy water. Our pool water hardness products help you correct and maintain optimal levels to protect your equipment and ensure a pleasant swim.

Before closing your pool, make sure your water is properly balanced.
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FAQ

Water hardness, measured by calcium levels, protects your equipment and stabilizes the water balance. Too low a hardness level promotes corrosion, while too high a hardness level leads to limescale deposits and cloudy water. Maintaining the correct level ensures clear water and a long-lasting pool. To learn more about complete pool water balancing, see our guide.

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Use a calcium hardness increasing product. Dissolve it in a bucket of warm water (be careful: the solution will get hot), then slowly pour it into the pool with the pump running. The ideal area for a pool is generally between200 and 300 ppm.


To reduce water hardness, there is no common chemical product: you must dilute the pool water by partially draining it and adding fresh water. Excessive hardness can lead to white deposits, cloudy water, and damage to equipment.


Fill a large bucket with lukewarm water, gradually add the water hardness increaser, stir, and allow it to dissolve completely. Caution: the reaction may release heat. Then pour the solution around the pool with the pump running.