good luck on your PB- they are beautiful fish- I have 2 yellow, 1 purple, and 1 naso. All but the naso was put in together and they've always done fine together. When I added the naso, I also added a couple of other fish at the same time. The harrassed him for a big that night, but they were all settled down in a day or so. I think putting tangs in together is the trick, if any.