Here are some pictures of my Ritteri, I took them just a few minutes ago. I bought this guy in February of 2005.
My system is 180 gallons. The lighting consists of 2 x 250w metal halide lamps using IceCap Ballasts and Lumenarc III reflectors. The bulbs are Phoenix 250 14k's. I have a Korallin reactor, an AquaMaxx protein skimmer and two vortech MP40s.
In the past, I used two Tunze 6060's and an older Hamilton hood using 250 20k's and an energy hog magnetic ballast. I wrote that information, just to show that switching lighting will not totally affect an anemone. In fact, I have moved my tank and the anemone has been moved 2-3 times.
As for feeding, I used to feed silversides almost daily, but I have stopped that practice and only feed once maybe twice a week. This beast is 18" across.
Let me know if you need more info, I am happy to share it!