Is there a medication guide that people go by when quarantining certain fish? For example would you qt clown fish with different medications than you would a tang or wrasse?
Typically, you never want to use copper on any scaleless fish like sharks & rays. I also wouldn't use copper on lionfish, puffers, seahorses; raise it very slowly in the presence of angels & wrasses and look for signs of copper intolerance (i.e. complete appetite loss).
Wrasses in general are very sensitive to just about all meds (especially Prazipro), so take care never to overdose with them. And the only wrasses I ever recommend using Chloroquine phosphate on are fairy & flasher.