Looking for input on what may be going on that my gem tang just stopped eating. I got him about 10 days ago he has been in 20 gallon QT doing TTM. Qt was medicated with copper power (2.6ppm). He was eating frozen like a pig, fat and happy. 2 days ago he stopped eating all together. I have not seen any labored breathing, yawning, scratching or markings on body other than slight stress coloring when I then on the light inf room was dark which goes away after a min. I did a fresh water dip and apears to be flukes. I have moved him out of copper and into new sterile tank to treat with Prozipro. Fish is still active but showing no interest in any food added to tank. I have tried frozen and live brine so far. Any thoughts would be appreciated