Introduces millions of beneficial bacteria into your aquarium ecosystem. The beneficial bacteria work to reduce organic waste on ornaments, gravel, and filter systems. The bacteria are natural and non-pathogenic and will reduce the organic waste that the fish release, including ammonia and nitrate. For startup aquariums, first use a chlorine remover. For freshwater and marine aquariums. Treats up to 1,900 gallons. Please click on "More Information" for usage instructions and storage. | ||||||















