I think if you can raise the CO2 concentration a reasonable amount for a reasonable amount of time, you can increase metabolism, size and yield. That's simple science. How much so, and return on investment is relative though. I'd say if you have a cheap way to try it, do it.
Yes Gov. ...agreed. I just don't like the added messin around. Bin there with it.
The weed i grow, grows fast enough for me...