Product Description BioGuard Burnout 3 is a high-powered chlorine shock that will quickly kill off any bacteria or other organic contaminants, restoring your pool water to clarity and health. Its quick-dissolving granular formula can be added directly to pool water without messy pre-dissolving, making application easy and hassle-free. It is designed specifically to work safely in vinyl and plaster pools without fear of bleaching, and is also compatible with chlorine and bromine sanitizers. Best of all, Burn Out 3 is made to the exacting standards BioGuard demands of all its products, allowing you to buy with confidence.