I have a yellow tang, two tank raised perculas, and selling my blue damsels because they are getting aggressive.(and to let eveyone know, I know it is a 40 gallon becoming a reef, and I know that the tang will get to big for the tank, I sell the adult to the pet store and get a new baby one) I want to know what brand of skimmer is not to bad expensive, but does it's job, and also with the existing fish included can I have 4 or 5 chromises, one blue hepatus tang(probably didn't spell it right, otherwise known as Dori from Finding Nemo) and a flame angel, and a cleaner shrimp and some crabs and snails. Is my tank big enough to hold these animals, and don't forget I can sell them to the pet store when they get to big. And live rock will be the main filter, along with a 3 stage bio wheel filter. And one more question, what should be on live rock to make it a good filter, some type of alage or something else. answers are appreciated.