Ideas for getting an anemone out of the corner?

[Caine]

So he was fine with being blasted with the return flow. I also tried to burry a rock that he was standing on and covered up his foot with sand. That didn't work either and by that time I was ready to give up for the evening so I made a rubble pile in the corner so that he isn't so hard to get out if the corner again. The way he is in there now it seems like a mini rock wall might be the thing for him.