I would try to get the fish in a qt and treat with copper power. However if you treat your tank you can have corals again. You will need to do some massive water changes and run cuprasorb for a few months to absorb any leaching. Here’s a pic of my tank. I had .17 ppm copper in august from a bad prob holder magnet and some how my ro/di unit got copper bombed. The inside of the ro membrane housing was teal. Currently my copper tests at .04 on my Hanna. However my ATI test two months ago said undetectable. After my magnet blew up I will always run cuprasorb as a precaution. It saved my corals.

. We’ve all been there. Probably more than once. It’s terrible that there is such a learning curve in this hobby and we’re learning on living creatures.
Most of my fish was gone. Except my naso my cardinal couple and a yellow tang. Six line wrasses where getting better as well. All every single fish was severally infected and it went fast. The only one I dipped where the clowns. IMO I do not know why it turned around but after putting medicine for several days from my local Fishstore and doing water changes like a mad woman I actually gave up on the medicine that’s when I did the dip with the couple. I also that day believe it or not bought a fish yes I did ! I bought a blue streak cleaner wrasse. That tiny fish was having a thanksgiving dinner in that tank. Since then I have kept one of them in my tank ( the first one jumped out after a few weeks so i replaced that little guy ) anyway since then I never had ich again and these wrasses do clean all the other fish all day long.

