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Thread: Sponge filter

  1. #1

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    Default Sponge filter


    0 Not allowed!
    I am planning to make a DIY sponge filter to save a few buck(I'm cheap). I will be using PVC pipe for the uplift tube. I was wondering if the airstone should be positioned above or below the perforation(the sponge will cover this area) of the uplift tube.

    Which would be more effective in creating the necessary vacuum for it to work?

    I cant give a diagram beacause I am using my iPod :(
    Last edited by alrightyroo; 09-06-2011 at 11:07 AM.

  2. #2

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    Default


    0 Not allowed!
    The lower the air stone the better.

    Most people buy sponge filters to be cheap. They run about $10 and don't need replacement cartridges. I would just buy one. I prefer Azoo, great quality but cheaper than some.
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  3. #3

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    I made my own the sameway and it works. I dont use airstones and I put the end of the airhose at the bottom of the pvc.
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  4. #4

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    Default


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    just buy one off ebay for 10 bucks
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  5. #5

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    Default


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    http://www.ebay.com/itm/Aquarium-Fis...ht_3003wt_1396

    there only 3 bucks that would beat any price :P
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  6. #6

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    Default


    0 Not allowed!
    Been there, done that.
    Please DO spend the money on a decent sponge if this will be your only filter. Cheap won't work nearly as well as a piece of reticulated foam. The fastest way to get good foam is to purchase an AquaClear replacement sponge.

  7. #7

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    Default


    0 Not allowed!
    Thanks for the replies!

    Dont worry dbosman, .his will be a supplement filter. The sponge is open pore and is suitable to made into a filter.

    I thought the vacuum is created due to the rising bubbles so this means the vacuum is right below the source of the bubbles and that would be the airstone and not around the bubble. This led me to think that it would be best to place the airstone or the tip of the airline just above the perforation.

    Can someone explaint why will putting the airstone below the perforation work beter than when it is placed above?
    Last edited by alrightyroo; 09-06-2011 at 11:05 PM.

  8. #8

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    The longer the bubbles travel, the more flow they create.
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  9. #9

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    Default


    0 Not allowed!
    when the air is pumped into the filter is wants to leave going up and then out and rising to the top, the water inside the filter is being displaced and seeing how there is a fow started by the air, the water will follow suit, taking the path of least resistance. so as the air is put into the filter and leaves the outlet water will come threw the sponge and into the tube where the air is. the further down the air is the more displacement it will make and the more water flow,
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  10. #10

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    0 Not allowed!
    Cut a slot into the sponge, bury the airstone in the sponge. This will difuse the bubbles and create a nice draw into the pipe from the bottom...Just a thought
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