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post #4 of (permalink) Old 10-17-2012, 11:54 PM
Planted Tank Obsessed
Join Date: Feb 2010
Location: Woodstock, IL
Posts: 354
You need to test whether it will fall apart under water. Just take a small amount and put it in a cup of water and lt it sit for a week. If it turns to mud, dont use it. If it holds it shape and it wont pulverize under finger pressure, its good to go.

I used this technique to add Hi-Dri to my tank. Didnt even wash it.
dmagerl is offline  
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