Pool water hardness increaser in large 18 pound size for raising calcium levels in swimming pools.
SwimEeze's Hardness Plus is a product that raises calcium levels in pool water to prevent corrosion and scaling. The calcium hardness in your pool should range between 180 and 225 ppm. If calcium level is above 500 ppm, drain some water and add fresh water. If calcium level is low, add SwimEeze Hardness Plus.
Note: Spa Sauna Direct only ships pool and spa chemicals within the continental United States.