I'm trying to setup a 29g with amazon swords/java fern/java moss and I was wondering how much wpg do I need? Right now I have a weak 20 watt flourescent fixture on it(I have anacharis/crypt/java fern right now)
the java ferns/moss should be okay with what you have, but will grow slowly. I think the sword might need a little more. someone with more experience will chime in shortly i'm sure...