Sorry if this has been covered, and I did search, maybe not good enough though. I'm not new to ich and have treated it a couple times over the years, but not in a cold water natives tank. I just had a horrible outbreak in my 150gallon. Last time I checked on my buddies in there was Saturday, come home today and cut the lights on and every single fish in the tank is covered. I mean from head to tail covered, all except one with only one cyst. Never seen an outbreak so fast and this bad. In my cichlid tanks I've used copper based products and the salt method with good luck, but I raised the temp slowly to 85F in both cases. Whats the best method with the coldwater tanks. I really don't have enough heat to get the tank to a stable 85. Temp in my shop where the tanks are can get as low as 50F, I have no trouble keeping this tank at a stable 72F, but I'm worried that at higher temps it may fluctuate too much cause more stress on the fish at night. What methods have yall tried that have worked and how long did treatment take with the FW natives. I know with my SA cichlids I treated for 14 days just to be safe and everything was fine. Oh, and the only thing in the tank now is young bluegill. Thanks