just a shot in the dark really, but i see what you did there, and thanks now it explained to me it`ll prob stick..
i do tend to learn by doing than absorb it from text, looks good and i see now its a good thing that for all intence purpose`s (spelling) its better to let her get a little "overgrown" (yet not totally filling screen of course).....
i`ve had some growth and glad to say a little smell, maybe its just me, but also some what look like preflowers, nice tight nodes still so i lifted the lights a little to help them up just a little...
the co2 i think takes two or three days to start working and even tho the rooms not air tight i feel its worth a shot...