An air pump is a mechanical device that sits outside of the fish tank and uses electricity (either from a wall outlet or battery power) to pump air into the aquarium. The air travels from the air pump to the fish tank decoration or device, creating bubbles that float to the surface and pop. You only need an air pump if you are using an aquarium device, such as:
For more information about air pumps, read the full article on how to use an aquarium air pump.
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