William Jack ; From these forum pages I have learned that plants are making
hay sugars while the Sun shines and Switch over to being mostly Oxygen users at night!
this is when we would normally be experiancing our lowest night time temps and providing supplementary heat, so kinda cross purposes here !
If we could be sure 24/7 of the ratios of Oxygen and CO2 it might be fun to play with the system and see how adding Co2 would actually do, there is a rather famous lady in New
England
I THINK who keep chickens penned in the floor area with some further extension of her growing season ! Someone will probably chime in here !
Remember with Carbon Dioxide you only get one chance to be wrong ! Hope this helps Big AL.