Blue tang QT tank

[Uncle99]

Thanks everyone, we put the blue and purple tangs who had both got these spots and put them into clean salt water, cleaned out their tank and placed them back in last night. This morning they have no spots! Must have been the water with the copper irritating them? And producing the mucus plugs. Thanks again

Or they fell off as a normal part of the cycle.
It’s been 5 days. Potential for reinfection. Watch carefully next couple of days.