BioGaurd Burnout 73 superchlorinator swimming pool shock restores the sparkle and clarity to your pool water. This shock features the highest percentage of calcium hypochlorite of all the BioGuard shocks. Each one lb bag treats 16,500 gallons of water, making it one of the strongest swimming pool shocks available. Suitable for use in all pool types.
Ingredients: Calcium Hypochlorite: 73%, Other Ingredients: 27%