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Why Have An Air Pump On A Fish Tank

It is very common to buy an aquarium in the store as a package deal where you get everything you need in one box so it becomes a plug and play type of system and the learning curve is lessened due to not having to work out what equipment you need to set up a fish tank. It is very un-common however to get an “off the shelf” solution and it comes with an air pump and air stone so we wanted to explore why this might be and whether it is something that is essential for your fish tank.


The short answer is that an air pump is not essential to keep a successful and healthy aquarium however in some instances it is greatly beneficial. So we need to establish why an air pump is used at all and what it actually does. The air pump in an aquarium will generally pump air from outside the tank to inside the tank through an outlet. This outlet might be of ornamental and aesthetic value to you such as a coral which opens up to let bubbles out or a car or boat which you like the look of. It might simply be output through a hidden air stone too. Either way the effect is the same.


The purpose of an air pump on an aquarium is to oxygenate the water. Some think this is down to the bubbles passing through the water, this has very little effect though and it is actually due to the surface movement which the bubbles create which makes a difference. The more surface water movement you have, the more contact the water has with the air and so the more oxygen gets in to the water. This effect can be gained from a filter outlet or a powerhead. The filter outlet must be pointing in the right direction, we have discussed the various options in an article about filter outlet direction options here.


The fact that this beneficial effect is the same beneficial effect which you get from the filter outlet is the reason why an air pump is not included in a standard aquarium package bundle which you might see in your local fish shop. It is taken care of by the filter outlet.

So why would you have an air pump on an aquarium if the filter outlet takes care of the water oxidisation? This is simple and all down to having the added back up of another product doing a similar job. We spoke previously about doubling up on equipment for your fish tank, this could be seen as a similar concept. It might also be down to wanting to help break down any film or layer you might have form on the top of your fish tank which could look like an oil slick. This layer prevents the oxidisation of the water and can sometimes only be broken down using an air pump. If this is the case then there is a strong chance you are over feeding but we have covered the possibilities and cures for a fish tank surface film in another article.


You might simply want to have bubbles in your aquarium because you like the look of them. Best thing to remember is that they can’t do any harm and can only do your fish and aquarium good so it is recommended that you install an air pump and air stone in your fish tank, even if you have it on a timer switch so it is not on 24/7.

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Tetra APS50 Silent Aquarium Air Pump for 10 – 60 Litre Fish Tanks

  • Pleasantly quiet, thanks to sound-absorbing chambers
  • Special vibration-absorbing rubber feet
  • Excellent quality and reliability
  • Highly consistent air flow thanks to powerful, durable membrane
  • Includes air tap for adjusting the air flow

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£15.31 In Stock

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Uniclife 4m Airline Tubing Standard Aquarium Air Pump Accessories with Air Stones, Check Valves, Suction Cups and Connectors

  • All In One Package – No Worry about Mismatching – Complete standard set of aquarium accessories for most air pump brands.
  • 4m Airline Tubing – 0.5cm Standard ID Clear and Flexible material. Desired length for most fish tank, Toxic-Free, White, Flexible, and Kink-Resistant.
  • 2 Air Stone Cylinder – 3cm Airstone can be easily driven by even Nano air pumps. Suitable for aquarium, fish tank and hydroponics. Measure 2 X 3cm (D x H).
  • 6 Suction Cups and 2 Check Valves – Excellent 0.5cm ID Standard airline tube holder, stick tightly to the smooth fish tank. Red clear valve can prevent water from back siphoning.
  • 4 Connectors (Straight & T-shape) – Perfectly connect standard tubing, T-connector allows you to combine two inputs to create one output with dual outlet pumps.

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£6.49 In Stock

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Aquarium Air Pump with Dual Outlet Adjustable Air Valve,3 Watt Ultra Silent Oxygen Pump for 1-120 Gallon, Fish Tank Air Pump with Accessories Air Stones Silicone Tube Check Valves T-branch Connector

  • [FISH TANK OXYGEN AIR PUMP] : The healthy life of fish is inseparable from sufficent oxygen.This 3W air pump in compact size but has a high air output of 2x 2500ML/MIN, fits for 1 to 120gal fish tank, helps to increase the oxygen content in water, creates a oxygen-rich environment for fishes and plants.
  • [2 AIR OUTLETS & ADJUSTABLE FLOW RATE] : Equipped with two air outlets, this air pump can run two fish tanks at the same time, or run in two different corner of a large aquarium to offers sufficient oxygen. According to the size of tanks, adjust the flow rate, which help your fish thrive in the oxygen-rich environment.
  • [ULTRA QUIET ] : The 4 Non-slip shockproof base can effectively absorb the noise caused by friction.This enclosed air pump offers large air flow while working with a noise level of less than 40dB, leaving a quiet living environment. And put it on a blanket or mouse pad, which able to keep it quieter.
  • [SAFE & LONG LASTING] : We using the spherical airstones after testing, and it’s easier to sink into the bottom; Comes with two check values to avoid backflow of water, safer to use; Over-heat and over-load protection ensures the stable performance, also helps to prolong service life.
  • [PACKAGE INCLUDES] : 1x aquarium air pump, 2x 3.3ft air hose, 2x air stone, 2x check value, 1x t-branch connector, 1x user manual. Unlike the submersible pumps need to must be placed in water and need to clean,Our air pump is puted outside the tank,very safe and durable.

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£14.99 In Stock