There's a couple ways to get rid of aips. Natural ways include a nudibranch, I think bergia or something like that or peppermint shrimp. In my case, 30g tank full of aips was taken care of by 3 peps w/in a week. However, they usually won't take care of any huge aips that you have so you can either: suction off as much as you can and let it regrow smaller and be eaten, or...
use a product like Joe's Juice (google it for websites) It's amixture that you simply 'feed' to the aip and coat/smother it. Never used, but apparently works well. You can also inject a kalkwasser paste into the aip but from the sound of it(no offense) I don't think you use kalk. HTH