Our best-selling Super Shock comes in a package of 12 1-pound bags, each containing 68% calcium hypochlorite with 65% available chlorine. This fast-dissolving shock treatment is perfect for giving your pool a quick and effective chlorine boost, eliminating algae, bacteria, and other harmful contaminants. Simply add one bag per 10,000 gallons of water for optimal results. Keep your pool clear and healthy with Super Shock!