Where'd you find that black safe-t-sorb?
Hi philipraposo1982,
I find about 40 pounds of Safe-T-Sorb #7941 will cover six square feet of aquarium bottom to a depth of about 1-1/2 inches. I like to put a slope in my substrates in my tanks with the back deeper than the front (it does tend level off over time). Typically I have about 4" depth in the back and 2" depth in the front when I first set up my tank.
75 gallon just set up with Safe-T-Sorb #7941
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