This liquid will rapidly and safely establish the aquarium biofilter in fresh and salt water systems; thereby preventing the 1 cause of fish death: ''new tanks syndrome''. It is formulated specifically for the aquarium and contains a synergistic blend of aerobic; anaerobic; and facultative bacteria which facilitate the breakdown of waste organics; ammonia and nitrate. The bacteria employed are non-sulfur fixing and will not produce toxic hydrogen sulfide. This product is completely harmless to all aquatic organisms as wellas aquatic plants; thus there is no danger of over use. Treats 45 gallons for new aquariums; treats 400 gallons for established aquariums.