Myself I have a pair and The trick to them in getting them to eat, but if you want them to live longer than a year or two then you really must provide them with the proper diet as in angels and tangs all fish need there own proper diet in order to survive. For copperbands their diet really has to contain some type of worms, ie black or bloodworms. Please don't get this fish just to get ride of pest anemones, there are other methods of riding your tank of those, get a copperband because you want a copperband. As for the Naso, I wouldn't worry to much about that, as in its completelya different shape, Naso usually are quite passive fish as far as tangs go, I can see why a yellow or such would go after a CB as simliar shape. But still, QT and then best to add the new fish in the middle of the night when everything has gone to bed, I have had amazing success with this.