December 25, 2009, Newsletter Issue #116: About Aquarium Air Pumps
Tip of the Week
An air pump simply bubbles air through your tank. Air pumps serve two purposes. First, they insure that your tank maintains an adequate concentration of oxygen. An air pump is NOT required for this purpose, as long as your tank maintains adequate water movement together with surface agitation. This is generally the case if external (e.g., powerheads for circulation, box or cannister filters are used). Second, air pumps can be used to force water through a filter (e.g., sponge or corner filter). If using an under gravel filter, for example, an air pump produces bubbles that force water up the uplift tubes, pulling water through the filter. In larger tanks, powerheads perform the same function. Thus, an air pump is not required, provided your tank has good water circulation.
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