Anemones can be very difficult to care for - they need stable water parameters, high intensity lighting (which you have) and supplemental feedings. Please wait for several months (or longer) before adding an anemone to a new tank and please don't add them to tanks without live rock unless the species places their foot in the sand. Water intakes have been the downfall of many anemones. I've had to rescue one myself before from a powerhead. It survived, but minus a few tentacles.