How old is your tank? I have a 29 biocube as well. What's the stock list? I can see at least 3 fish in the pic, watch out for the tang police (assuming that's a yellow tang), looks like a good start!
Looks nice, please research the needs of all livestock needs before u add. That will help you go a long way in this hobby. Everyone will have different opinions buy ultimately u are the one responsible for ur tank. Some fish need a lot more swimming space than others.