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My idea to make a homemade free aquarium bio-filter. would this plan work?

Do you think this would work as a biological filter?
My idea is to take a plastic soysauce bottle and fill it with gravel. put a tube thru a hole in the cap with an airstone till it reachs the bottom of the bottle (and under the gravel it contains).
poke pin-holes along the bottle or a few hot-fork burn holes.
put it in the tank and run a pump thru the tube.
my theory is it will make a bio-filter. would this work? would it be effective? a lot? a little? not at all?
i would use it as either a supplementary filter in my 30 gallon understocked tank, or for a primary filter on a 5 gallon tank with only 1 betta and nothing more.

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6 Responses to “My idea to make a homemade free aquarium bio-filter. would this plan work?”

  1. Thuy says:

    anything can work if you just believe in yourself!

    joking…try it out…it doesn’t hurt!

  2. sɑʀɑн says:

    I think it’ll work in a 5g aquarium, but it’s not going to be strong enough for anything else. I can’t picture it in my mind and how it would work, but it’s worth a try!

    Kudos to you for creativity.

  3. mrsnoodle says:

    Do it its worth a try! if you think you have all the necessary tools try it!

  4. Mike G says:

    Yes this will work.

    You can buy small sponge filters on ebay for about $3.00 with shipping but I too like to build my own stuff so give it a try :)

  5. Nikkski says:

    Good idea!
    Wrapping an open-cell sponge around the pin holes would add a place for beneficial bacteria to grow.

    Just don’t use a kitchen sponge as they come with chemicals in them.

  6. Collin says:

    it helps to also put some of those filter fiber pads, that look like cotton, i make my own filters too

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