juvenile emperor angelfish

cb emperor angel - 1 1/2" Juv $50.,,, curbside pick up only in in SF bay area (north bay)

Hello, I just had a quick question are juvenile emperor angelfish copper safe? if not how should I QT them? I will use Copper Power @ 2.0 for 14 days. I tried to look up answers but there wasn't a yes or no answer. Also will it be ok with a blue tang and a 3 inch coral beauty angelfish? I think...