I have a yellow tang that is going downhill fast. Added a peppermint shrimp to the tank and stressed it out. Started showing HLLE but kept eating. Kept deteriorating so I finally pulled it and put in quarantine. Now has dark spots. So far all I have done is three days of rally. Tang has not ate since being put in quarantine. Looks like it has ich now also. I would like to get it eating before I start copper. Open to any suggestions now. Thanks