My tank is fairly new and is FOWLR right now, I'm just looking ahead to the future, when I can make a few changes. Eventually, I'd like to keep a tank with just a couple of really interesting specimens. Including a really big clam, and maybe a show-sized fish of some sort. My tank is 7 feet long, about 2 feet wide, and just under 3 feet tall. Would a giga or squamosa grow out of this set up? Would a large panther grouper be ok as a tankmate?