I have not been having much luck with my fish recently. I just lost a flame angel today, 2 days ago my hippo tang died and my longnose yellow butterfly fish died like 2 weeks ago. I'm not sure what the deal is. There is one common observation with all the fish that have died. They stop eating the day before I find them dead. My tank is a 45 g long fowlr tank. I have 55lbs of LR which have a few mushrooms on them. The fish that are currently living in the tank are: 1 false perc 1 lawnmower blenny 1 chromis viridis Temp:75-78 Ammonia: 0 Nitrite: 0 Nitrate: 2ppm The current fish show no signs of external parasites. I will say however, that I used to have 2 false percs in the tank and I removed one and put it in a hospital tank 'cause it developed a small white spot on the gill and the dorsal fin. (I put it in the hospital tank a week ago). I'm currently treating it with coppersafe. I don't know if this infection is related to the other fish deaths. It is strange that the other fish currently in the tank show no signs of infection. My flame angel and the yellow long nose butterfly fish, both died within 4 days of being introduced in the tank. The hippo tang died 1 month after introduction. Here's how I originally stocked the tank: 1. 5 chromis viridis (they killed each other off in 3 weeks) Water tests indicated that water quality was perfect when the last chromis died. (0 ammonia, 0 nitrite, and -1ppm nitrate) 2. 2 false percs introduced 3. 1 big chromis viridis 4. Hippo tang (1 false perc developed white spot) Hippo tang hid and never ate 5. Longnose yellow butterfly 6. Lawn mower blenny 7. flame angel Stocking was done over 2 months period. With 1-2 weeks between introducing fish. I jump started the tank using live sand and live rock from a tank that had been established for 5 years. Any ideas?