The Planted Tank Forum - View Single Post - Biological Filtration Survey
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post #12 of (permalink) Old 11-19-2020, 05:24 AM
AbbeysDad
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The manufacturers of commercial bio-medias would have us believe that beneficial bacteria only lives on/in their media in the filter. Commercial medias often brag that their media is best due to the vast surface area with all those nooks and crannies and micro holes. Whether gravel or sand, there is far more surface area in the substrate than in any filter...not to mention the countless other life forms that make up the true bio-filter. My filters only contain sponge material. My 60g has 3-4" of pool filter sand, untouched except for plant maintenance for over 8 years. I have fast growing floating water sprite.

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