An anemone is always a risk, esp. moving. Best advice I can give: Start it hi in the tank (as close to the light as possible) and give it room to move, just in case. There are no guarantees, so if you decide to get one, prepare as best you can. We got a BTA a couple/few months ago and placed it on a "pinnacle" rock. It moved to the opp. side of the rock at about the same height. I was able to turn the rock for better viewing and it hasnt moved (other than maybe an inch) since. Lucky maybe, but we're not complaining. Can post a pic or 2 if you like.