CO2 is not a must for a majority of the aquarium plants. However, with
the right amount of light, fertilizers and substrate they can make the
plants grow insanely healthy. In a way, if done correctly, it can help
the plants fight off algae (you'll come to know this word very soon ...
a note of things to come for you.)
Mind my asking how many watts of lights are what kind of substrate are
you using for your tank?