I've done the bb before and while it's nice to have high flow I personaly don't like the look, even when encrusted with coraline. I think it has something to do with the black tank lip being taller than the bottom. My ideas for my new tank include something like starboard, white acrylic or smaller tiles as a base to allow for mounting frags on the bottom but still be removable. Also I've looked into the epoxy and sand mix in a thin layer, looks like sand but is solid. Might go that route but it's a bit more permanent.