Pool Mate 25 lbs. Calcium Increaser for Swimming Pools

Pool Mate Calcium Plus is used to raise calcium hardness levels when measures drop below the recommended range of 200-400 PPM. If calcium hardness levels are too low the "soft water" will corrode pool equipment, etch pool plaster and may cause metallic stains. This is a dry granular product that increases the total hardness in pool water to the recommended range.