There are no guarantees that even after it seems to settle in that it won't decide to move. As bulb life changes, you rearrange rock, change type of flow directions. Within 1 night it can move all the way from one end of the tank to another, so doubtful trying to keep it on one end of the tank is going to work ideally for you given enough time.
I have had RBTA move and get caught/stuck within the branches of a Hydnophora. Had I not noticed it soon enough it would have taken out the RBTA. As it was half of it was goo and pulled through. However, believe it or not the Hynophora suffered equal damage that I couldn't keep from spreading and lost the whole thing and it was show sized.
I won't add an anemone to a SPS dominate tank again, nor would I recommend it. I'd hate to see the possibility of causing damage to a prized tort.
Yes, I'm sure there are success stories, but it's a time bomb waiting to happen given enough time. Keeping any powerhead intakes, overflow teeth protected is a good idea. I'm sure if it starts on the move and the foot can't hold on to the rock and starts to float that could easily get caught in the intake of a Tunze, will it happen ? not likely but certainly can and trying to cover the intake with a sponge of sorts will be too restrictive so just a gamble you must be willing to take ( Just not me ). Over the years, I have never lost a anemone to one but have definately damaged enough of them sometimes causing a split.
Now I keep anemone only propagation tank and/or in a lower flow softy dominate tank.
