Whats up with the color of your corals? Some look like they are bleaching.
They are indeed. Don't really know why.
Regal, do your run GFO's like phosban or Rowaphos? Do you have a Hanna meter? IMO, based on the colors you are getting, your tank is extremely nutrient starved.
I've seen this in many tanks and have experienced. If you want to fix this problem.
1st Get a hanna meter and test. Your Po4 is probably .01
2nd Remove GFO if running
3rd shorten the MH photoperiod
4th increase bioload and feeding