Join Date: Dec 2004
Location: Prior Lake, MN (Twin Cities)
I am throwing this at the wall, maybe it will stick. I have MTS in my tanks, they burrow and are said to help the substrate from going anaerobic. The other thing that you may find some helpful info on is rfugf reverse flow under gravel filters.
I dont think there is much if any info on a soil depth that you are looking for, but it is a start.
I would think that the mountain would settle however
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46 bow front low tech
10 gallon No tech