Been down this road as many have. I tried the Copperband, the LFS owner told me they would do a number on the aptisia but that there was an outside chance that it would go after my zoas also. It did and I pretty much had to destroy the tank to get him out. The pepermint shrimp did the job, I did find that they wouldn't touch the bigger atipisa and had to use Atipisa X on those, but they took care of the smaller ones. The tank never really became Aptisia free but the fight was manageable after the Peppermint shrimp were added. JMO I think the Copperband isn't worth the risk, if you get one as I did that goes after your zoas, if you have any, you will have to tear the tank down to get him out. You can't wait for a fish trap to catch him, your zoas maybe gone by then. The reason my tank never became Atipisa free was because I had some big ones in my overflow box that I couldn't get to without taking the canopy off. My new tank will not have a canopy, the Atipisa is one of the reasons why, not the only reason, but one of them.