This is a first for me since i have only 2 fish in my reef tank. One died today and i am upset. He was my favorite fish. A flame hawk. I have no idea what killed him but he was not eating before he died and was breathing rapidly and was kind of lethargic. No visible signs on body and no cuts or anything on body. No mucus film, nothing. My question is, i have a six line wrasse left. He didn't eat today and i am worried that he might have something. if he passes, how long do you have to wait to put NEW fish in the tank and do you have to do a major water change or does whatever killed them have to host something to live. Any answers would help. Thanks :sad2: