I also assume you mean aiptasia, since antipasta is easily gotten rid of by putting a little oil and vinegar on it and chowing down
I wouldn't use copper bandeds at all. Have tried them twice over the years, both failed to eliminate aiptasia, but did die since they wouldn't eat anything else they were offered either.
I used aiptasia X for the first time this past weekend, and apart from being labor intensive it seems to be the best solution. Only one or two of the little buggers came back, and a second blasting seems to have taken care of it.
Just make sure you remember to turn off your pumps before you apply it, and keep em off for 15 minutes or they'll blow the gunk all over the place.