Pumps are versatile devices which can be used for a variety of purposes in aquariums. They are used to power inside box filters, sponge filters, under gravel filters, airstones, aerating ornaments, and provide oxygenation by moving water to the surface. It is important to understand that a pump introduces ambient air into the aquarium. Consider any sources of airborne pollutants to be potentially harmful.

To obtain maximum longevity and performance from your air pump, avoid restricting a pump's output. Use a gang valve which provides one more outlet than the objects to be driven. This will allow extra output to be vented, and back pressure will be avoided. When using airstones, it is recommended to replace them on a regular basis, which will prevent unnecessary back pressure. Always use a check valve to prevent any water from back siphoning verify that it functions correctly and replace it if necessary.