hey frank
first off great tank i rememeber when you were just posting pics setting it up...
second off, if you plan on keeping acropora of any kind those clown gobies are a problem! i had a pair of them and they ALWAYS nest in acropora , thats what they do and knew that but i gave it a shot anyway and they would kill some of my acro off...
im sure its too late to catch them now but just a little heads up for ya!