110 Gallon, Cost to Cost Glass Cages build

[jsker]

It is not actually sand. It is called coal slag (nothing to worry about with it. Completely inert and stays that way). It is used for sand blasting.

Black Diamond is the brand you can get at Tractor Supply. Go for the medium grit, as it is about the same as special grade with the size, doesn’t get blown around, and sand sifters/sleepers do fine with it. Doesn’t affect alk, bond po4 and is basically just a place for bacteria to live. @dantimdad has also used it for years. Not sure if he does icp tests like I do, but nothing odd has ever showed up using it. Just need to rinse real well and then put it in. Rinsing is only to remove dust.

Thank you. I do have black sand now.