Forget it, Co2 do not work. And no light will not work needer.
Reason for that his, more Co2 will help the plants grow faster and in the same time combat they algea. That will work only if you have the right amount of fertilizer to help it grow.
Putting your plants in the dark, will kill algea. But will put you plants at risk to.
What will work is excel double the dozing, for at least 1 week. But that will not stop from coming back.
You have fertilizer problem. So go on Google, type aquarium algae, I promise you will find what you need.
P.s. In my opinion, if you don't have a good quantity of plants. They may not be able to combat some types of algae.