Hungriee, BK is right. The high wattage lighting and Iron fert helps. But don't be discouraged! Even my nesea grows a little green on the top. Try Flourish Iron. I actually bought a plastic syringe from Duane Reed so I can be precise on my mL measurements. Plus, squeezing iron from a syringe into a tank is pretty cool!
Que, Fishorama, BK...thanks for the words! It's so fun to do this. I'm really enjoying it.