Haddoni carpets are not too demanding as far as anemones go. They will do better with clean water and bright light and not too much circulation. Carpet must have sand as they like to burry their foot in the sand. Once they settle, they can grow very fast with lots of food. They are very aggressive fish eater. In the confine of a tank, they likely will eat some of your fish even huge big tangs. Don't put any fish in the tank that you cannot loose.
Red Haddoni are difficult to find and cost a lot. Purple and blue are slightly cheaper. Good luck in finding a good one.