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Aquarium Air Pumps

Air pumps can be used in two main ways in the aquarium: either to power small internal filters and undergravel filters (UGF) or for aeration only, using airstones. When used to run UGF (by placing the airline in the uplift tube), an airstone should be attached to increase the number of bubbles and hence water movement. Having a well-aerated tank will help stabilize pH level and provide the necessary oxygen for respiration.
 Have questions about Aquarium Air Pumps? Checkout our FAQ!

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Have Questions About Aquarium Air Pumps?

We have answers. Get quick help for common questions.

1. Do I need an air pump in my fish tank?
Not always. Your filter outlet often moves enough water, but an air pump adds oxygen, which helps heavily stocked or warm tanks and is needed to run sponge filters.
3. Are air pumps noisy?
Modern pumps are quiet. Standing the pump on a soft mat and fitting a non-return valve reduces hum and stops water siphoning back in a power cut.
5. Where should I place my air pump?
Ideally above the water line on a stable, dry surface. If it has to sit lower, such as inside a cabinet, use a non-return valve on the airline.
2. What size air pump do I need?
Match the pump's output to your tank volume and the number of airstones or sponge filters. Double outlet pumps can run two lines.
4. What is a non-return valve for?
It stops water siphoning back down the airline into the pump if the power goes off. Fit one whenever the pump sits below the water level.
6. Why has my air pump got weaker?
The rubber diaphragm inside wears over time, and airstones clog. Try a new airstone first, and if airflow is still low, a replacement diaphragm usually restores it.

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