Help! I went on a family vacation for 10 days, and had a good family friend come over to my house to take care of my tanks, and when I return my RS 200XL is overrun by Ostreopsis Dinoflagellates (I was struggling with them before I went on the vacation, but it had started to recover.) I currently use a 24 watt UV sterilizer, and am doing a 3 day blackout period. When I returned, the tank was in complete disarray. Dinos are on everything, at least three corals dead, all zoas are closed, all hard corals are bleached or bleaching, and rocks are absolutely coated in dinos. I use IO salt, and an RO/DI filter.