A Series Air Pumps are designed to significantly improve water circulation and essential oxygen levels for fish, plants, corals and beneficial bacteria. Hobbyists will appreciate a powerful air delivery that is designed with quiet operation and energy-efficiency in mind, in addition to adjustable flow control dials that allow each outlet to be independently controlled. Powerful air delivery – provides excellent output flow-to-pressure ratio Engineered noise dampening baffle chamber deliver a quiet operation Oversized rubber feet stabilizers reduce vibration Adjustable flow control dials allow each outlet to be independently controlled Energy-efficient – draws as little energy as 2W (Small model) Space saving rubber hang tag easily mounts to side of aquarium stand for less clutter For use with 1 or several air stones Total Output: 180-220 LPH Outlet: Double Wattage: 3W Aquariums up to: 80 US Gal / 300 L