I will try to think of more fish and corals that would be good. Julian Sprung once wrote on a 75 gal tank for mandarins, but that was several years ago. I dont have the article anymore.
For other corals, perhaps some types of mushrooms. I once had a huge colony of green star polyps that grew up both overflows. It had layers of mat on it, which housed a bazzillion bugs.
Fish like, some of the goby fish, like yellow watchman. Jawfish would be good tankmates. For upper water, perhaps green chromis, although they require several feeding per day. Perhaps a smaller species of tank raised clowns, like percs. They could live in a large umbrella type leather coral. Problem is they are still clowns and can get agressive, not to mention clowns and damsels,{ esp. the larger ones}, have a tendacy to fan the crap out of your sandbed, making a mess.
I will think of more once my brain gets working again.
