Planted Tank Guru
Join Date: Sep 2006
Location: Northern California
You need to dose ferts (macros: NPK, and micros: TMG or CSM+B) for the plants to keep up with your lighting and CO2!
Your lights are telling your plants to grow, but there's no food for them to grow...
I'd run 65watts for most of the day, with two or three hours in the middle of the day with both banks running. And start dosing! Get some fertilizers from Greg Watson.