I've been observing the regal and I'm pretty certain its ich. The white spots look like small salt crystals on her fin and some parts of her body. It does not look like the ich is spreading but that isn't a guarantee the situation is getting better.
She's currently in the DT with some chromis, clowns, and a basslet. I plan to isolate her in a hospital tank once the spare heater arrives today.
Copper treatment is an option but I think that is a more invasive treatment.
David