Small update: I was able to replace the stock Actinic bulb with a 6500K JBJ bulb. It's about 10mm longer than the Biocube bulbs but it still fit. Now I've got the full 48 watts of light going putting me at 3.4 watts per gallon. My duck weed is pretty out of control now and the cabomba is really showing some nice color at the tip. I'll snag some pics later today.
So, I would say CO2 is the next step in my set up as well as a way to confine the duckweed.
Last edited by Basil; 12-13-2011 at 11:28 PM.