Calcium Hardness Increaser Calcium Chloride. Low water hardness could stain or etch the pool surface and corrode equipment. 6 pounds of Calcium Hardness Increaser per 10 000 gallons of water will raise calcium hardness level by 50 ppm.
Calcium Hardness Increaser Calcium Chloride. Low water hardness could stain or etch the pool surface and corrode equipment. 6 pounds of Calcium Hardness Increaser per 10 000 gallons of water will raise calcium hardness level by 50 ppm.