There is a tang at Petco that my wife and I thought was dead on Saturday. It was stuck to the intake of their tank, completely grayed out - not a hint of color. The fleshy part of its fins were gone - just the spines. It also had a notch out of the top of its body. We went back the next day to see if Petco stocked something else we were looking for and the fish was still there, but this time we noticed its eyes moving and parts of its body. I have a 20 gallon QT to try treating it and all the meds out there - prazi, cupramine, kanaplex, metroplex, sulfaplex, etc. I'm curious to know if it might be possible to save this thing and eventually move it to my 300 gallon tank if it makes it. Futile effort??? Looking for thoughts and feedback on how bad this thing might be. I wish I had a picture. They only stock yellow tangs and hippos, so it has to be one of those two.