The Planted Tank Forum - View Single Post - Using purigen in a sponge filter
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post #13 of (permalink) Old 11-07-2013, 02:04 AM
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Join Date: Mar 2010
Location: Spring Valley, IL
Posts: 7,701
I would guess the sponge filter IS the problem. Its probably not enough filtration for your bioload and you would be better off with a HOB filter, even if its a small one.
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