The Planted Tank Forum - View Single Post - CO2 or not with Low Tech
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post #21 of (permalink) Old 10-31-2012, 08:25 PM
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Join Date: Dec 2011
Location: phila., PA
Posts: 2,311
That substrate from aquarium plants will cap dirt just fine. I have used everything from ecocomplete to play sand to cap dirt, and that is in between the two, so you'll be good.
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