Fish choice

[Cap'n]

no experience with royal gramma

green chromis are so peaceful it is hard to believe they are related to demon damsels

bangai's would probably be a good choice for your tank. They pair up nicely and hang out in the open water; not very active though

firefish will also be in the water column; beware of these skittish guys jumping

six-line wrasses are fantastic! active swimmers seeking out all the nooks and crannies in the rockwork