Well, I may have jumped the gun a little bit on my shrimp tank overhaul. I bought Christmas moss, knowing that is is very easy to care for and can be grown in low light to high light setups. I spread it out on the new driftwood and tied it down like crazy. I then decided to look up xmas moss care and everything I've read has stated it does well in low light (like i had thought), but by low light everyone is saying 1.5 watts per gallon. My 20 gallon only gets around 1 watt per gallon. Has anybody had success growing xmas moss in a low light setup like mine? I do dose with API leaf zone once a week. And right now the moss looks about the same as when I put it in around 5 days ago.