Well...this is day 1 after release, so they've got a ways to go yet. They do appear to be eating frozen baby brine and rotifers I've squirted in their direction though.
To be honest, I don't have the time to raise them right now with the move coming up. If they're still there and I can get to them, you're more than welcome to try them out yourself when you're in town next. They should have put on a bit of size by then. Perhaps raising them together might net you a pair or harem. I'm not sure, but I don't believe the Banggais are hermaphroditic. I've got a trio, but the lone female is mostly left out by the other two. The female of my pair has actually been standing watch over the babies, which is kind of neat to watch. They've taken up hosting in a little 5-6 polyp zoanthid growth that seems to be growing behind the rock in the back corner of the tank!