My tank 50 gallon reef tank has been skimerless for 2 years and all my fish, corals and invertebrates have been thriving so far. I must say that my tank has no SPS and perhaps that's why I can get away with running a skimerless tank. So far my corals have been growing pretty well. In fact I sell frags often so to say that a reef tank cannot be skimerless is not entirely true.
Here is a link to another beautiful skimerless tank...check it out!
http://www.reefcentral.com/forums/sh...hreadid=893433