Hi Chris,
Interesting to see how successful is your tank setup as I have just started mine few weeks back.
However, mine is a 2ft IOS tank, thus do not have sump as you have. My weipro skimmer has to be hanged outside at the edge of the glass. Quite unsightly, but what to do?
I have yet purchased any coral, but seeing your healthy corals boost my confidence as well. Will look around to see if I can get one or two this weekend.
I have a cooling fan like what you have, question is what direction of the blowing do you place your fan? With air blowing directly at the water surface or blowing away from the water surface?