As long as you get the right anemone theres a good chance the clowns(2) will take it, and drive the third clown off and possibly kill it, that is if they are all in your 58. Clown should be kept in pairs or schools. Im not up on my clown/host anemones so youll have to research the correct anemone, but then again i have seen false percs take both bulbs and long tentacles, which are the two hardiest host anemones. I believe the carpet or the magnifica is the false percs true host, or maybe thats true percs, beats me, get Joyce W.s book. All anemones are mobile and will move around the tank in search of the perfect spot, sometimes you get lucky and it stays where you put it. Some also tend to have two spots, a shady spot and a well illuminated spot. If on one of these voyages your anemone walks over or brushes into one of your corals it can sting it and cause problems. If you are to get an anemone I would suggest a captive bred one, drop me an e-mail and I can tell you where to get one. HTH