Sludge Destroyer from API is a liquid bacteria that helps digest sludge and also dissolves other organic material for a healthier aquarium. Containing billions of bacteria spores per dose, this product reduces the maintenance required for your aquarium by eliminating build-up and other organics. This also prevents bacteria from multiplying by removing their breeding environment. The API Sludge Destroyer is sold in 8 oz liquid bottles only, and one bottle will treat 237 US Gallons. Ideal for use with animals that add high amounts of waste suh as cichlids, goldfish, turtles, or overpopulated aquariums. Safe for use with all animals. This is one of the best most natural ways of reducing waste without the use of harmful chemicals.