It's up to the anemones if they want to stay or not. My RBTA has split 3 times and working on it again. They pretty much stay put (probably the best anemones for staying put) but I have one wandering in my frag tank now in a safe spot and another one wandered onto an Acan piece and is happily attached to that not letting go. So far he's not killing any of the polyps so he's staying --- for now.