HTH PLUS Calcium Hardness Increaser 25 lb

Lowcalcium hardness can cause swimming pool water to be corrosive, resulting in damage to pool surfaces, vinyl linings and equipment. Use Hth PLUS Calcium Increaser to raise the calcium hardness levels in your water and prevent corrosion of your pool surfaces, including metal and plastic. Hth Calcium Up is great for all pool types, including vinyl-lined pools and saltwater systems.