So, I fed my fish a couple nights ago and my Kole was out, eating, and seemed great. I have had him in my DT for about 2 months after two weeks in the QT. No problems at all and seemed really happy. Next night I went to feed the tank and he was nowhere to be found......thought maybe he carpet surfed, but never had a fish do that before and it would have been difficult. Anyway, he surfaced last night and was dead.....looked like he had been for over a day. Anyway, parameters are good, no problems with any of the other fish or the corals. Any idea what could do him in so quickly?