I'm switching my 110G into a chichlid tank and now prefer to use a sand substrate for them. I now have a black pebble gravel and love the look. I'm wondering how this would mix with Black Diamond Blasting sand or (more $$) Tahitian Moon substrate from my LFS? Would the sand mix or go to the bottom? Anyone try this?Or has anyone tried mixing large pebble gravel with white sand aragonite or PFS it would be the same thing I think?