Steve, whoever told you Aiptaisa's were good was off their nut. They are the bane of most reefers lives. You say you have heaps of them in your refugium? Then one probably released spores or something which got into your main tank. Unfortunately a Copperband won't go with your Ray, and the Peppermint Shrimp that are also used on Aiptasia would be a nice snack for him too. A great, cheap way to take care of Aiptasia is Kalkwasser. Using a plastic syringe you squirt the anenome with a little bit of Kalkwasser, right on to it's oral disk. This makes the anenome retreat into it's hole, making it ingest the Kalkwasser, thus killing it. A little bit on every anenome and voila! No more Aiptasia.