Hey, I'm sure you'll be able to grow many different plants with that CO2 and high light. About the carpet plant: In my tank I have some four leaf clover, but to be completely honest with you, I'm not in love with that plant. it always grows exactly where I don't want it to grow, and I have to be cutting it all the time to keep it under control. Might I suggest Elatine triandra. This one grows a little tall, but if you keep it trimmed from the tops it will spread and make a good carpet. Another all-time favorite is the HC. I don't think you'll have trouble growing either. I mean, I don't have any CO2 in my tank (Except for the Excel) and the HC is doing fine.