Hmmmm.... I'm not sure if a Copperband that small is going to help you much with those. He might just end up getting stung and never touching them again, which oddly is what happened with the dozens of peppermints that I've bought to help my problem.
Agreed with youpey, Joe's Juice is the best since they try to eat it and end up getting shriveling up and dying. I've tried boiling water, which kills them instantly, but for every big one I hit, another bunch of small ones seemed to take its place. Like a hydra or something. If you do decide to go with it, just make sure you inject (for lack of a better word) the juice directly into their mouths to avoid getting any in your BTA. Everything else is fine. I've had clouds of it float over my ricordeas and zoo's and my clown try to eat it without any health problems.