Personally I find carpet anemones one of the hardiest anemones to keep. However, there are 2 things you should take note of. They are not exactly reef safe as they have a very strong sting and will eat anything which comes into contact with them, even big fish. Secondly, in the wild they prefer to anchor themselves in sand. I kept my carpet in a 10 gallon aquarium with a 36W 6500K PL. Did weekly 50% water changes. No skimmer, running on canister. Kept it for about a year and I had to give it away as it outgrew the tank. Then again it might have been the health of my specimen as I collected it directly from the sea. It was not subject to additional stress at retail outlets.