I have a Yellow Banded Possum Wrasse that is in a QT with a firefish and a yellow watchman. Fish have went through full metro and prazi. They are in 2.27ppm copper (ramped up over a week) for 3 days. The Possum wrasse stopped eating frozen yesterday (was an agressive eater and hung out where I put in frozen food all the time) and now is hiding all the time. It is also laying down on its side inside the pvc pipes. If I get close to the pipe or shine a light in the pipe the possum wrasse pops back up and moves and hides again. Not sure what I should do? Is this a copper intolerance? Should I move the fish out of copper? I’ve had this fish for 3 weeks now. (white specks are on glass not fish)