Having a well aerated aquarium provides the necessary oxygen for fish respiration and helps stabilize pH. Aeration provided by the air pump is also helpful in expelling carbon dioxide from your fish tank.
Types of Aquarium Air Pumps
Electrical air pumps - most commonly used.
Battery powered air pumps - normally used when transporting fish, or as a back during power failure.
Air pumps are used for running the following equipment
Air stones - this adds air bubbles to create visually attractive effects and more importantly oxgenation of your aquaruim.