The b;ack & white is probably not the reef safe kind. The schooling banner is more likely to be reef safe.
I have one and have had a few. I have purchased four over time, only two made it out of QT. My first I had for two years, died in an ick outbreak brought on by a tank move. The one I have now has been in my display, for 8-10 months and only started eating pellets last week! Eats frozen anything & everything like I never feed it!
I think a 75g is minimum and that will only work for a few years, they can get pretty big in time, but do grow fairly slow. Very very peaceful, beautiful fish IME. I wish I had two they would be awesome to watch.