Here's a couple pics of my tank

[yajman]

I've had two Potter's angels, and neither of them I saw picking at any coral.
I will say that you should stay away from the larger ones in stores, they never seem to be eating. Both the current one I have, and the one that died last year (huricane power outage), were pretty small, between 1" and 1.5" Each one was eating by the next day.

Frag: The tank has been set up a little more than a year.

I'll probably get some more photos up tommorow.