Wanted Copperband butterfly fish

[Treebeard]

I had the exact same experience with my yellow tang. He was hassling the CBB so I trapped him, banished him to bad fish corner of the sump for two weeks and let him contemplate his evil ways. But when I put him back in the display it was like he had never left and returned to his old self. Fortunately he has a very short memory and fell for the trap again.