shouldve read the next line. light drives CO2 need. low light tanks need less CO2, if you have low enough light, ambient CO2 is enough and you dont need to supplement it.
that said, dissolved organics do tend to help most algae out; and good maintenance never hurt an aquarium.
I did read your next line and it was too general a response, you added to your original line that you stated in your original post. If you would have stated that I probably wouldn't have said anything.