Aqueon Quiet Flow 60 Aquarium Air Pump, Up to 60 Gallons Fits aquariums up to 60 gallons Each air pump has replaceable check valve, diaphragm and filter pad Features a wide rubber base that absorbs vibrations, making air pumps virtually silent The vertical design and integrated check valve on the QuietFlow Air Pump positions the air outlets in an upward direction, preventing airline kinking Repair kits designed specifically for Aqueon QuietFlow Air Pumps are available, so you can replace worn out or damaged parts without purchasing an entirely new pump