BioGuard Algae Complete - 72 fl oz The once-a-week dual-action algaecide for all swimming pool types including plaster, vinyl, and more. Prevents and kills green, mustard, and black algae. BioGuard Algae Complete is a highly effective and fast-acting swimming pool algae destroyer. Algae Complete kills all types of swimming pool algae including black, green, and mustard algae. Algae Complete is formulated to complement most swimming pool sanitizers. Effective and non-staining when used as directed. When used as directed you will see results in 24 hours. Non-foaming and can be used in swimming pools with attached spas or jetting returns. Initial dose of 8 ounces per 10,000 gallons. Weekly add 1.5 ounces per 10,000 gallons. Active Ingredients: Poly (oxyethylene (dimethyliminio) ethylene (dimethyliminio) ethylene dichloride) 6.50% Copper sulfate pentahydrate** 13.07% Other Ingredients 80.43% **Metallic Copper 3.3%