Hey guys, have been dealing with some scratching and flashing in the 600 gallon. I clearly had ich on my hippo tang and I treated the system with cupramine. Today, still a little scratching here and there, but no fish show any ich or salt like spots on body. My purple tang is though currently showing some sort of spottyness. The spots are not raised on the skin at all and they appear too large for ich. Any clues or insights would be appreciated!

This is has the light adjusted so the spots are more pronounced.

Thanks!

This is has the light adjusted so the spots are more pronounced.

Thanks!