krosebush...in summary, anemones are creatures that can live a long time. They require exacting lighting and excellent water conditions. Many people have what I would call anecdotal success, but, really, anemones should only be in the hands of highly experienced marine aquarists.
If you buy an anemone and it is not happy, it will begin to move about in the aquarium 'looking' for a better spot. In so doing, it can sting the #$$^%& out of any coral or animal it comes into contact with. If the anemone dies or gets caught in a powerhead intake, it can nuke your tank. IMO, they DON"T belong in nano reefs and should only go into a mature tank under the auspices of highly experienced if not expert marine aquarists. SH