How to make your own DIY Aquarium Air Driven Filter & learn The Nitrogen Cycle!

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Uploaded by on Dec 19, 2010

~Nitrogen Cycle

The ammonia can be in two forms. Toxic (to the fish) ammonia is in the form of NH3 and occurs when the ph is greater than 7.0. Nontoxic ammonia is NH4 and occurs when the ph is below 7.0. Ammonia is very toxic to fish.

Ammonia is broken down into Nitrites (NO2) by special bacteria called "Nitrosomonas" bacteria. Then the Nitrites are broken down into "Nitrates" (NO3) by another special bacterium called "Nitrobacter bacteria". Nitrates are not harmful to fish unless they become high. The most effective way to keep nitrates low is through water changes.

In a new aquarium very little of the nitrosomonas or nitrobacter bacteria are present, and need time to reproduce to sufficient levels to breakdown their respective nitrogen compounds. The bacteria attach to surfaces in the aquarium such as gravel (if you have it) or the material in the filter, such as sponges that have a large surface area for the bacteria to attach to.

~Homemade DIY Aquarium Filter

This process requires the following items: Gravel, Filter floss or sponge, straws, tube, silicon tubing, air pump.

It will take about 15 minutes to make this very efficient homemade filter.

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Uploader Comments (DiscusKev)

  • You sound like a British Vietnamese guy.

  • @RegulusPure Not that it is important but for your information, I am British but I am not Vietnamese.

  • I have a 40 Gallon aquarium that has been running for 2 years now. I can't figure out why that tank keeps having high nitrate levels. I have other tanks and the nitrates stay low in those tanks. Any ideas?

  • @mosaicglass Maybe because that fish tank isn't highly aerated or the sponges within the filter is too saturated (although, the more mature it is, the better which means I could be wrong). Just do more frequent water changes to keep it down as it will remove and keep the nitrates to a minimum level (but not low enough to corrupt the nitrogen cycle)

  • Nice video - I really like this - I'm going to try something like this in a 2 litre bottle (or maybe a bottle with a larger mouth) - While you don't really need an air stone it would help break up the bubbles more - I just took out and under gravel filter from my tank - so I have all the optional parts lying around - Good vid

  • @Kabosh709 Thanks for the comment and I think a bottle with a smaller mouth will be better as it will have a bigger impact towards driving the air out, hence drawing in the water into the filter chamber.

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  • go to my channel to check out my homemade filter

  • All I could focus on what the fact that you're wearing a tank shirt in the middle of winter....

  • y dont u just go buy a filter because the things u need might cost more than buying an ordinary filter but if u have these things laying around i mean its a good idea

  • @kurei008 Im going to do a low flow filter drip most likely..

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