Wow, what a steal.
Anywho, What type of algae do you have? Knowing what type of algae you have can help pinpoint what the problem is.
Here are some broad general options/tips that may help.
1) Raising the lights a couple inches to lower the light intensity.
2) Adding floating plants to help shade and reduce nutrients in the tank. Plants like Duckweed, Amazon frogbit, Water sprite, etc
3) Adding CO2, Flourish excel, etc
4)Adding more plants. Just jampacking and heavily planting.
5) Reducing your photoperiod.
10 hours is a bit too long, Some may disagree but anywhere from 6-8 hours a day will be sufficient.
Comment on the Algae type and I'm sure somebody here will give you a better, more detailed solution.
Best of luck!
The Fraternity of Dirt #169