I've been interested in getting an anemone for my aquarium at some point. The lighting and flow are adequate for most species I've read about but the tank is not mature. I know that anemones can, and often do, wander around the tank stinging other sessile creatures as they go. Another member suggested once adding an anemone before corals so that it can wander around freely until establishing a permanent location. Is this what others have done? How long then do you wait before your tank is mature enough to add one?