I have had this Maroon Clown for over a year. I purchased it through a craigslist ad and do not know how old it is. I believe the previous owner had it for some time. It usually stayed in one corner of my tank and occasionally swam around. Always came out to eat something and always ate its favorite pellet food. About 4 or 5 weeks ago, I noticed it wasn't eating and was moved to a new position in the tank and wasn't swimming around a lot. I easily caught and removed it and put it in QT where I had a Blue/Green Chromis that was getting picked on by other fish. I still haven't seen it eat anything, however, it is not dead so it HAS to be eating something, right?!? How do I tell if it has an internal parasite? If it did, wouldn't it be dead already? When is it safe to put it back in the display tank? I really want to take down the QT Tank and put it back in with its friends, but don't want to chance getting my other fish sick. There were no new additions prior to it getting sick. Could it just be getting old?
Any advice?
Any advice?