Hmm.. What kind of little carpets? If they are maxi-mini anemones, the clowns will not host them ever. Same thing goes for mini-mini anemones. Also, I wouldn't get an anemone just because you think it will make the clowns happier. It's been proven several times that clowns will host just about anything.. Powerheads, Sand, fake rubber anemones, heaters, whatever. You name it and a clown could host, should they choose to do so. The setup you have now is fine, and unless you decide to get stronger lights and your tank matures for a little longer, i would cut out an anemone. To keep a nem happy long term, you want strong lights, and a mature tank to minimize the risks of any tank fluctuations, which irritate anemones. They are very sensitive creatures, even if some nems are hardier then others.
Oh yah, and Welcome to AA!