I have a 24 gallon JBJ. Metal Halides and 3 stage filter.I just go a group of 40 or so Assorted Zoos, and they are doing great! I have 2 fish right now. Purple Firefish and Royal Gramma.I am thinking of starting to build my reef rather than more fish. How much can I put in this tank? What would you suggest for my next Coral purchase? I have Crabs, and 3 Peppermint Shrimp too. A few little snails.