Jim Seidman wrote:
The original poster has 30W on a 15g, which sounds like pretty low
light to me. I don't know what kind of lighting is on your

2 watts per gallon is by no means low-light.

"moderate-light" tank, but I suspect that it's much better-lit than
that.

I have cabomba in the 110 gallon tank, which has about 1 gpw of CF light on
it. The darn thing (along with every other plant there) grows like a weed
and requires weekly prunning.

--
Victor M. Martinez

http://www.che.utexas.edu/~martiv