The Planted Tank Forum - View Single Post - Biological Filtration Survey
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post #14 of (permalink) Old 11-19-2020, 04:28 PM
AbbeysDad
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I'll go a step further to suggest that we've also been somewhat conditioned to think that sponge material in a filter is for mechanical filtration only. In fact, sponge material (aka bio-sponge) is a great platform for beneficial bacteria. Proof of this are the many large fish rooms out there that rely solely on air driven sponge filters.
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So although I may rely primarily on the bio-filtration of the substrate in my established planted tank, my filters that are all filled with sponge material, will also contain beneficial bacteria. I just don't need overpriced bits of plastic, ceramics, or rocks.
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Disclaimer: I will confess that I do have two large baskets of (BBQ type) lava rock in the 40g sump on my 110g bare bottom stock tank.


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Last edited by AbbeysDad; 11-19-2020 at 05:10 PM. Reason: clarification
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