Hi , need help to cure my emperor, I'm new to this and not sure what to do .
started a copper treatment .
fish are still feeding . But I'm afraid things might go bad soon .
any advice?
Definitely ich or velvet on the emperor. Also looks like flukes potentially. You can do a freshwater dip - just search for the process here. It's super easy and will give them some immediate relief while you ramp up the copper.