Anemones are alot hardier than people think IMO especially the BTA's, people have had success after putting them in a newly cycled tank were as some havent, I still would risk putting one into soon but i know some people that have. I wanted to wait 6 month before adding corals aswell to prevent the anemone roaming and stinging corals. So i waited 6 months added the nem left it for a few weeks till it found a nice spot and started adding coral.