HTH 8 Oz. Pre-Measured Water Soluble Calcium Hardness Up Pods

This product raises calcium hardness in swimming pool water. Come in convenient pre-measured pouches. Low calcium hardness levels may cause the pool water to be corrosive, resulting in damage to pool surfaces and equipment. Plaster finish pools may be etched or stained if the calcium hardness of the pool water is not properly adjusted. Helps to keep pool water comfortable for swimmers. Compatible with saltwater systems.