sebae anemone stuck to glass: help

[viix]

I tryed searching but couldn't find anything on this. I'm currently upgrading my take from a 15g to a 42g. I went to transfer my (sebae) anemone and found he was stuck to the glass bottom under my sand. Any tricks to get him to move or detach? I heard ice worked but I tryed that and he didn't care. Any help would be great I could use a response asap. Thanks