OK so actually I'm gonna go with the innovative marine 30 gallon. I have done a ton of research and know what is needed. I plan on have 3 or 4 height levels of egg crate for frags. I am going to get the innovative marine nuvo nano protein skimmer and the minimax all in one media reactor for the back to compartments in the tank. But now I have a couple questions...this will not attach to my 55 DT it will be a separate system. I have two taotronics 120 w led lights over my 55 and was wondering should in use the same lighting for the frag tank? The lights on my 55 have kept all corals clams and anemones so I imagine it would be fine with one over the 30 gallon am I correct? Also should I have a sand bed I know its user preference but what are some pros and cons of having a sand bed and not having one? Also what should I keep in there besides coral? I was thinking some snails, hermits, peppermint shrimps, cleaner shrimp, and possibly a six line wrasses (as I have read the eat flatworms and other bad things that can be on coral), would these be ok? Thank you in advance for the help. Also I have kept my 55 up for over two years now so I know about the upkeep and cycling.