Just a positive suggestion on your corals losing skin:
Cut them down to the largest healthy pieces you can and separate them. Even a REALLY small piece can grow back. (I should show you the scraps I grew out from the BAR swap last year, one turned into one of my favorite pieces). Then, with the bad pieces coat the dying parts with normal superglue, not the gel, but the thin stuff. I've tried this many times with good success. I hope this helps and let me know if I can help.