For advice, if you haven't kept an anemone before, stick to either the bubble tip, E. Quadricolor, or a sebae, H. crispa. Carpets can be stubborn, not many fish host in them, and they grow large, sting strong and pretty much decide what else you can and can't add to the tank.
H. crispa's like moderate flow, and will reside under your brightest MH, they really like 10K bulbs. They will either bury and attach their pedal disc to the bottom of a rock or the bottom of the tank if its large and healthy enough to hold itself through 4''-6'' of sand. Their sting is moderate and not too sticky, but small fish may go missing often.
Its hard to find H. crispa's not bleached. I rescued mine from a LPS. They can get back their color if offered good care. I actually kept mine in a 20g for 6 months and it did fine. I think they are easy to acclimate, as I have never had one die even if they're bleached. They are very resilient IMO!