Aquarium Air Pumps

There are two general air pump designs: the diaphragm type and the piston type. The former is much more common and generally provides enough maintenance–free use for the beginner’s aquarium. The piston pump, however, is more powerful and should be used in larger aquariums, particularly if an undergravel filter and multiple airstones need to be powered. The size and power output of air pumps vary. Consult your local dealer to match your aquarium with the proper air pump.