Yeah i agree with mr tang on this one. Most fish, after they hatch have a planktonic phase in which the tiny juveniles float up to the topof the tank(ocean in the wild) where they feed on plankton and eventually grow large. This is where the difficulty lies, keeping the juveniles alive at this stage, and not allowing them to get sucked down an overflow box, or through a pump to a protein skimmer. You also must have no other fish/corals in the tank, because corals will feed on the babies as will the other fish. Good luck though, and if you have any success, be sure to let us know about it!
jon