Why Do You Need an Air Pump in Your Aquarium?
An aquarium air pump moves air, often under pressure, to create water circulation and improve oxygenation. By increasing underwater currents, it prevents dead spots and stagnant areas in your tank. Improved circulation moves carbon dioxide-rich water from lower in the tank to the surface, allowing gas exchange and keeping oxygen levels high.
Air pumps are also used to power equipment such as:
Under gravel filters
Sponge filters
Protein skimmers
How Do I Set Up an Air Pump?
Place your air pump above water level to prevent backflow.
Fit a non-return valve inline with the airline, with the black side facing the air pump.
Many pumps include a bracket to hang on a wall or place on a shelf.
Connect the airline to your air stone or device.
Tip: Check our instructional video for a visual setup guide. Each one is listed on the main product page of the item you have purchased.
Air Pump Size: How to Choose
When selecting an air pump, keep the following guidelines in mind:
Number of devices: The more equipment you are running from the pump, the larger it should be. Fewer devices require a smaller pump.
Resistance: Larger air stones or complex devices create more resistance, requiring a stronger pump.
Future proofing: Choose a pump slightly larger than you currently need to allow for expansion or underestimation.
Air Stone Function and Benefits
An air stone is a porous rock connected to an air pump that compresses air into fine bubbles. These bubbles:
Improve oxygen absorption into the water column
Prevent dead spots where debris can accumulate
Cause water surface movement
Can be used for aesthetic effects in bubble ornaments or aquascaping
Overall, air stones help promote a healthy, clean aquarium for your fish.
Common Air Pump & Airline Questions
Why is my air pump noisy?
Noise often results from vibrations or positioning. Place the pump on a shelf above the water and avoid direct contact with hard surfaces. Adding a sponge underneath can help.
Ensure airline tubing is free from blockages or crushing, and check the outlet connection for damage.
Why does my air pump have no power?
Check positioning above the water line and inspect the airline for blockages.
Inspect the pump and connections for damage. Contact customer service if you need further help.
Why has my airline tubing changed colour?
Airline tubing may turn cloudy, blue, or green over time due to oxidation, temperature fluctuations, or algae growth on the outside.
This is normal and does not harm fish or affect performance.
Summary:
An aquarium air pump is a vital piece of equipment for circulation, oxygenation, and powering air-driven devices. Proper setup, size selection, and maintenance ensure your tank remains healthy, quiet, and visually appealing.