Out of curiosity what is the composition of the tank? In my experience (which I'll admit is limited) is that in a softy tank it's not a huge deal, so a squishy reef is fine with anemones, it's when you start getting stony corals that things make a turn for the worse, simply because they tend to grow in such a fashion that can drastically change water flow patterns hence screw with an anemones happy place. Don't get me wrong plenty of people have anemones of one type or another in a reef tank, but you do really need to let them decide where the "best place" is, where you choose is never going to be the best place.