BioGuard Burnout 35 - 1lb - Case of 12 Burn Out 35 is a shock product that can be used as part of the BioGuard Care System. Weekly use keeps the water crystal blue and sparkling. Burn Out 35 oxidizes contaminants that cause cloudy water, chlorine odor, and eye irritation. It is easy to use, dissolves rapidly, and is suitable for all pool surface types. 29% Lithium hypochlorite Convenient pre-measured bags Restores inviting sparkle. Destroys organic contaminants