The Planted Tank Forum - View Single Post - Dangers of ancient substrate?
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post #7 of (permalink) Old 11-19-2012, 04:23 AM
Hoppy
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Isn't it interesting that we believe that MTS, which is based on dirt or unknown composition, is "good", but, old substrate, which has miscellaneous organic stuff mixed in, leaving a substrate of unknown composition, is "bad". Personally, I think if I can stir up the substrate a bit and it stinks bad, it is "bad", but if it doesn't stink, it is "good".

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