Fluval A Series Air Pump. HIGH PERFORMANCE AERATION 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 ultra-quiet operation and energy-efficiency in mind, in addition to adjustable flow control dials that allows each outlet to be independently controlled. WHY OXYGENATE WATER? Oxygen is essential to living organisms and supports biologically pure water. Fish and plants require oxygen to “breathe” Beneficial bacteria need it to break down waste Promotes good circulation and gas exchange STRONG AIR DELIVERY The A Series Air Pumps improve water circulation and oxygen levels for fish, corals, and beneficial bacteria. Design with excellent output flow-to-pressure ratio for optimal aquarium conditions. For usage with 1 or several airstones or other devices depending on the model. ADJUSTABLE FLOW CONTROL A Series control dials allow each outlet to be independently controlled. Permits a precise, regulated airflow to aquarium devices Single and double outlet models available QUIET OPERATION Double wide construction Noise suppressing baffle chamber Oversized rubber feet stabilizers ENERGY EFFICIENT A Series Air Pumps draw as little as 2 watts of power (A101 model), making it a great choice for the environment. INSTALLATION OPTIONS Position flat or mount vertically. COMPARE THE MODELS ITEM # MODEL # TOTAL OUTPUT OUTLET WATTAGE AQUARIUMS UP TO A851 A101 90-110 LPH SINGLE 2W 50 US Gal / 190 L A853 A202 180-220 LPH DOUBLE 3W 80 US Gal / 300 L A854 A402 330-370 LPH DOUBLE 4W 160 US Gal / 600 L