Evrything is fine Ammonia-0, Nitrite-0, Nitrate-0, PH-8.2, Temp-79, SG-1.022..... Its got to be some kind of communicable pathogen.... The fish are going one by one.... No effect on Star Polyps, Mushrooms, Crabs, Snails.... Just fish one at a time... I did a 50% water change just to be...