How to Make an Air Pump for a Fish Tank

Written by naomi bolton Google
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How to Make an Air Pump for a Fish Tank
(Jupiterimages/Photos.com/Getty Images)

Aquatic creatures require air that has been dissolved in water to survive. Air pumps do not put oxygen directly into water though. The bubbles that they produce create gentle currents that bring oxygen depleted water from the lower regions of the aquarium to the surface, where it can be re-oxygenated through contact with air. Aquariums that are well stocked with fish will experience problems during power outages. In these circumstances, a DIY air pump will be most useful and could very well save the lives of all the aquatic animals in the aquarium.

Skill level:
Moderate

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Things you need

  • 1 insulin syringe
  • Non-toxic 100 per cent silicone
  • 6 inch transparent plastic pipe (1/4 inch)
  • 2 inch rubber pipe (1/2 inch)
  • Large balloon
  • 2 plastic cable ties
  • Small roll of duct tape
  • Hand pump (bicycle pump)

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Instructions

  1. 1

    Remove the plunger from an insulin syringe and discard. Leave the hypodermic needle in place.

  2. 2

    Push the 1/4 inch transparent plastic pipe approximately 1 inch into the back of the syringe (as if it were a plunger) and secure it in place with a small amount of non-toxic 100 per cent silicone.

  3. 3

    Place the syringe and pipe on one side to dry for 24 hours. Push the 2 inch rubber pipe approximately 3 inches into the “mouth” of the balloon and secure the pipe in place with two plastic cable ties.

  4. 4

    Place a small amount of non-toxic 100 per cent silicone around the mouth of the balloon, where the rubber pipe has been secured. Put the balloon and pipe connection on one side to dry for at least 24 hours.

  5. 5

    Place sufficient duct tape around the “free” end of the 1/4 inch transparent plastic pipe, to make for a snug fit once this pipe is pushed into the free end of the 2 inch rubber pipe.

  6. 6

    Place the 1/4 inch transparent plastic pipe and syringe on one side, once you are certain that this pipe will fit tightly into the 2 inch rubber pipe. Attach the bicycle pump to the 2 inch rubber pipe and inflate the balloon.

  7. 7

    Hold the end of the 2 inch rubber pipe closed with your thumb and forefinger so as to prevent the air escaping and attach the 1/4 inch transparent plastic pipe and syringe as quickly as possible.

  8. 8

    Rest the balloon on the aquarium canopy and push the syringe through a “feeding” hatch into the water. Air caught within the balloon will escape through the needle on the syringe creating a stream of bubbles, exactly as an air pump would do. The tiny gauge of the needle means that the balloon will empty very slowly.

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