Hey all, have a purple tang and brown powder tang. I suspect ich with Finn (powder brown) but Poe (purple tang) seems to have a different presentation altogether with a spot that doesn't seem to represent the "classic" ich signs from what I have seen/read. I tried my best with the pics but seems to a bit more than just superficial. I have a QT and the fin on Finn has had signs that have come and gone over the past few weeks so I will be putting all the fish through a QT with a fallow DT for 12 weeks according to Jay's very helpful post (https://www.reef2reef.com/threads/current-quarantine-protocol.825055/). Really, my question is about Poe and if that is maybe something else, such a fluke/parasite/tattoo where a FW bath before going in to the QT is a good idea or not? If someone can ID it just by the pics you are wonderful. Any suggestions, thanks! The spot in question is near the top by his dorsal fin (any other mark is bubbles or pods). Finn's fin discoloration is near the perimeter. I should also note my water parameters are all WNL, nitrate 3, PO4 0.02, Bicarb, calcium, Mg, pH, salinity all WNL. They also don't seem too bothered; eating and swimming actively.