Full case of 1-pound granular shock bags, designed to eliminate algae and bacteria in swimming pools with calcium hypochlorite.Contains 12 bags, each with 68% calcium hypochlorite (65% available chlorine), compatible with all pool types and sanitizer systems, treating up to 10,000 gallons per bag, per TropiClear specifications.Each bag measures approximately 8" high by 4" wide by 1" deep, packaged in dissolvable plastic, requiring no pre-mixing broadcast directly into pool water with the pump running, per manufacturer guidelines.Formulated to dissolve quickly in water temperatures above 60 degreeF, effective for weekly shocking or algae control at 5-10 ppm chlorine boost, ensuring compliance with standard pool care protocols.Powers through tough pool issues with fast-acting strength, keeping your jobs efficient and delivering crystal-clear water that keeps clients happy season after season.