The Planted Tank Forum - View Single Post - Tips on 'scaping with both sand & "gravel"?
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post #16 of (permalink) Old 11-13-2012, 07:17 PM
Diana
Planted Tank Guru
 
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 11,721
If the soil has some mixed particle sizes and shapes it ought to hold a gentle hill just fine.
If you want a steeper hill you may have to build something like a rock wall, not have soil on the face of the steepest part, just like in nature: Hills of soil are usually softly rounded, not sheer or vertical. Where the hill is steep it is because there are rocks.

Sand and gravel flatten out really fast.
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