Join Date: Jan 2008
Are you just looking to save money by switching from your PC fixtures to LEDs? You may not save that much money in the end, since LEDs are also a sizable investment.
Your photoperiod seems a bit long; I would reduce it to 8 hours.
For CO2, I would recommend pressurized CO2 for an aquarium your size. For more information, please take a look at my pressurized CO2 article that I wrote (linked in my signature).