Well got home last night after noticing my Bluethroat was breathing a lot. He was the only one doing it and seemed to be doing it for most of the time (2 weeks) that I had him. Needless to say...he was gray and gone. I tested and ammonia was nada....nitrites were nada as well as nitrates....not sure what was wrong. I fed the shark and lionface and they ate like the usual champs..as did the foxface and damsel. Gonna miss him :-(