I seem to continue to struggle keeping fish in my aquarium. It seems that every time I add over 7 fish in my tank i get a fungus outbreak. My tank is 160 gls mixed reef, so i don't feel that I am overpopulated. My water parameters are in check, I have no problem keeping corals. Wondering if anyone else has experienced anything like this and if so how did you correct it. I have started to consider getting a uv setrilizer.