all true mosses will do well under low light. I would definately not cover it, and willow (and phoenix I believe) is a bit slower-growing than java moss. Maybe a few little quarter-sized pieces where the wood meets the substrate?
I know what it's like to be torn. I have a 20 gallon long nearly empty of plants because I can't make up my mind. lol.
Thanks for the advice! I'll look into those two and consider the moss thing further. . .
I had a really difficult time choosing, too - I guess it's a good thing that a lot of my original choices had to get changed out for plants that would actually do well under low lighting and with a beginner's skill level! I can't EVER
cross over into the realm of high tech planting. I'd be a MESS!