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Old 07-09-2012, 11:37 PM   #1
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I made this sponge filter using one of those fluval edge pre filters into which I inserted an appropriately sized plastic tube. I then inserted an air stone inside.

My main questions are:
1- do you think this small of a sponge will provide sufficient filtration when connected to a 5gallon air pump for a 2 gallon shrimp only tank?

2- will it increase it's efficiency if I drill/ cut large holes at the bottom of the updraft tube? How big Should the holes be?
Also, Should the airstone be placed all the way at the bottom of the tube?
3- will shrimplets get sucked into it or into the bottom if I don't put a stand under it?

here's a picture, looks pretty sharp.



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Old 07-10-2012, 03:53 PM   #2
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spong filter

looks good-- make shure the tube is not open on the bottom of the spong and you will be fine
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Old 07-10-2012, 05:21 PM   #3
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I put a few pieces of gravel in the bottom. Do you think that will be good enough?
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Old 07-15-2012, 11:03 PM   #4
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How does this work?
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Old 07-16-2012, 12:01 AM   #5
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The rising air bubbles draw water through the sponge. It is a very cheap yet effective filtering method
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Old 07-16-2012, 09:44 PM   #6
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Could u share what you did to make this? I like the idea
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Old 07-16-2012, 11:18 PM   #7
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It's just a fluval pre filter with a plastic UGF tube stuffed inside and an air stone put into the bottom. The ugf tube has holes like Swiss cheese inside under the sponge only
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