I agree with a lot of the info here.
1) buy plants from the classifieds here. The plants will be healthier, your sure to have submersed grown plants that are true aquatics.
2) your lighting is low for demanding plants, there aren't many stems that will grow in a tank of that depth with that kind of lighting. Also, a longer photo period with low light intensity does not equal high light intensity. Stick to 8 hours a day and see if that helps your algae problems. If you're really going to do planted the only way I am every happy is high tech with high lighting and lots of CO2.
3) you should get enough phosphates and nitrates from fish waste, but you may need to supplement micros and K (potassium) either through dry ferts (look up rex grigg) or commercially available plant supplements. With swords and crypts, use root tabs.
4) Do NOT turn off your CO2. I would increase the CO2, but be careful you don't increase enough to stress the fish.
After that, its just patience. You will always have algae outbreaks, you just have to stay on top of it. Planted tanks are hard. But they are so rewarding when it works. Its a bit commitment, in time and resources ($$) but I will never go back to plastic.