I'm sorry, I should have mentioned the tank I put the Christmas moss in has about 3 WPG over it. You should try and up the watts if you can.The tank is a 30 long so it's not very deep, and it's being lit by a 36 watt CF light. I don't plan to upgrade the lighting since the tank's more about the fish than the plants. If you guys don't think it'll work, then I'll just hold off for now. Thanks for the input everyone.