PacifiClear Cal-Shock Granule Granular form of chlorine used to chlorinate, sanitize, and disinfect swimming pools. Contains 65% available chlorine. Convenient, easy to use, and fast dissolving. Chlorine is released when the product is dissolved in water and works continually to prevent growth of algae and bacteria. Used for shocking or super chlorinating pool water to destroy organic contaminants and clear up hazy water. Can also be used as a sanitizer and disinfectant for sewage and waste water applications, sanitize wells and natural springs, industrial water treatment, aquaculture, poultry plants, and kills and prevents growth of mold and fungi. Size 1 Lb., Form Granule, Pkg Qty 1, Package Type Pouch