Agree to disagree. Got light, got water, got photsynthesis.....then Co2 will help even if some of the other factors arent right....but i agree a noob will possibly not using the co2 to its full effectiveness, but it wont hurt as long as its not overdone to an extreme, and not delivered to early in the light hours. I just dont wan't to discourage noobies from using co2 because its not so big and scary when its broken down for em. Peace