I love the Copperbands. Any advice for me - I plan to keep one after my new 100 gallon reef becomes established. So far, I have been recommended to feed it Mysis. Anything else you've noticed? DO you have any full shots of your tank?
I can't really give advice about the Copper Banded, I have only had it for about 2 months and it is the only one I have had.
It does like mysis, brine and squid. Everything in small/tiny pieces. Although it has all but eradicated the aptasia, I have heard that they may also eat some corals. Like the ones in the picture below.