Join Date: Apr 2003
Location: Mid-Hudson Valley, New York
Also, Onyx sand is grey, not even a dark grey. And Moon sand is very fine, inert, and $20 a bag. It lasts about 24 hours on the surface with Onyx in my tank with MTS. After that, it's appearance is a disappearance below the surface. Buck was the pioneer here with Eco plus Moon sand. Maybe he'll chime in.