Keep your fish happy and healthy with our Aqua Culture 20 - 60 Gallon / Double Outlet Aquarium Air Pump. This powerful aquarium air pump is designed for 20-60 gallon aquariums and can accommodate up to 6 air-powered devices including bubble stones action ornaments and under-gravel filters. Our convenient box includes two check valves which can help prevent the siphoning of aquarium water into the air pump in the event of a power loss. The pump never needs lubricating and is rubber insulated for quiet performance pumping up to 2900cc per minute.