Rx Clear Swimming Pool Copper Algaecide 7% | One Quart Bottles | 1 Pack | Above or Inground Pools | Keeping Algae in Suspension KEEP ALGAE AT BAY- This product is effective in controlling a broad range of algae. Especially effective against Chara(Stone wart), Spirogyra, Cladophora, Vaucheria Ulothrix, Microcystis, Oscillatoria, Mustard Algae and Black Algae. The triethanolamine in this product prevents the precipitation of the copper with the carbonates or bicarbonates in the water. Rx Clear Copper Algaecide is used to prevent and kill unwanted infestations in your swimming pool. COAT THE WALL- Algaecide coats the walls of the swimming pool, keeping algae in suspension. Surfactant splits open algae cells, helping to destroy them.The Rx Clear Copper Algaecide coats the pool wall, keeping your swimming pool crystal clear. BIWEEKLY MAINTENANCE- Each bottle of Algaecide is 32 ounces of fluid. Swimming pools require only 4 oz. of Rx Clear Swimming Pool Algaecide every two weeks per every 10,000 gallons of water. SAFE TO SWIM- This fast acting treatment lets you swim directly after placing in your swimming pool.algaecide can even beat black, green and mustard algae, all while being safe for swimmers. SKIP THE WAIT- This product was made especially to control growth of algae in all types of swimming pools. Its long lasting action will control existing algae and subsequent doses will control recontamination...no waiting.