I am so bummed. Just when I thought I turned a corner something else happens. One of my otos in my 55 gallon is just hanging on by a thread. He almost looks like he died but I think he is breathing a bit. I am going to leave him til morning I guess. I am so confused why he died. Maybe I starved him I am almost sure it was one of the first ones I put in the tank about 1 month ago too. Do I just remove him and hope for the best with the other fish?