POND BUILDER BOOSTER , A mixture of eight super concentrated strains of bacterium. Natural indigenous bacteria establishes a healthy growth of good bacteria in biological filters. Uniquely formulated to condition fish coats and reduce aquatic stress. Converts organic matter into carbon dioxide and water. Creates a healthier environment. Pond Builder Booster is the granular (dry) version of the Pond Builder Starter. Pond Builder Booster begins to take affect after twenty minutes and entire contents of pouch does not have to be used immediately. For maximum performance use in conjunction with CareFree Enzymes Pond Pro. Follow directions closely. Includes 10 - 24 gram pouches. Each pouch treats up to 1500 gallons.