Pool Mate 1-2160 Non-Foaming Algae Rid Swimming Pool Algaecide, 1-Quart Metallic Algaecide (7.41% Chelated Copper) For All Pool Types (Vinyl, Fiberglass, Concrete, Gunite, etc.) Non-Foaming Prevents and Kills Algae Wait a minimum of 10 minutes after use Weekly maintenance dose: 1 oz per 5,000 gallons