Excellant advice from
@4FordFamily . Don't think I can add much . Top the OP, sadly it looks like internal parasites. It needs to be taken out and treated separately in a QT. setting up one doesn't take much of space or money like 50$.
I would definitely try live blackworms and may be Easy Reef masstick. Its very easy to put metro and focus in masstick and stick it on the glass and have them much on it for hours.
After I started using masstick on my Macropharyngodon and Anampses wrasses, feeding in frequent intervals has become easy along with administering metro.
Regards,
Abhishek