Yea, falling off corals sucks. Epoxy helps that.
Ok, so the bleaching seems to be your issue now, all else has been repaired or resolved.
You have to watch what lighting you getting your corals from under. If they are using Halides, and your using LEDs, your going to bleach them out. If they are under LEDs ask them what their intensity level is for them, then you can acclimate to your lighting over a period of a few weeks. being as this is your last item to check, you should be pretty set on keeping SPS. Then you'llk be banging your head against the wall, asking how the heck to keep the ATO full while dosing, and keeping up with the dosing, as those babies grow out, they use a ton of elements from the tank.
Keep us posted!!
Always here to help, I can't read all the posts, so if you ever have a thread not going your way, throw me a PM, we will get it going.