+1 on the Stripey. I put one in my frag tank that was covered in aptasia and it was gone within a week. Also they have a great personality.I just added an Australian Stripey - having gone down the path of Berghia (which worked, until aiptasia came back) and spot treating aiptasia for the last 3 years with F Aiptasia. Wish me luck. Have heard lots of good things about these fish - reef safe, love eating aiptasia, good citizens.