Easymack,
It may be working great with the co2, but it would be working just as good without it most likely. Unless you have a hella bright light, your plant isn't going to use enough of the already available co2 to require you to supplement it with more. But I don't think it would hurt either, so its up to you. Good luck.|

And R4, don't double post your question in every single forum, I already answered it in the grow lounge.