http://majanowand.com/
I've been using it on both majano's and aiptasia.
Actually, my husband built his own because these are rather expensive for what they are, but they are effective.
Have you seen the YouTube vid of the guy who uses a little toy laser (the illegal ones) to burn his aiptasia just by aiming the laser at it from outside the glass?
There's actually a few people who have done it now: http://www.youtube.com/results?search_query=laser+killing+aiptasia