biOrb & biUbe 12V Air PumpThe low voltage, safe air pump provides the bubble supply that powers the filter system and assists with oxygen diffusion in the aquarium. It is essential the air pump is left running permanently. biUbe and biOrb aquariums incorporate two one way valves to prevent water draining back down the air line; however, it is safer to place the air pump above the level of the aquarium water line. The air pump is designed to run as silently as possible but due to its pumping action internal vibration will be transmitted as noise if the air pump body touches surrounding objects. Works with all biOrb and biUbe aquariums 8 gal. or larger.