Monsanto GMO clinical trials are as valid as DEA sanctioned clinical trials for the medical validity of cannabis~
--fapping to the future responses of pro-Monsanto nazis (GMO is an excellent science under the RIGHT hands.. lol ., too bad its ran by a bunch of supreme douches)
Your welcome :)
And yes, those c02 levels are optimal~
In-regards to toxicity levels on c02--- you would need to be in an environment saturated @t around 10,000ppms for c02 to be toxic (thats for humans)..
Not sure what the toxic level is for plants (i heard a figure above 30,000ppm) --but im...
Agreed.. Just merely stating my personal experiments with c02-- Not at all advising growers to do what I did :)
On another note, running vents for fresh air would be enough to supply the needed c02 levels~
BTW-- why are you calling c02 poisonous? ..is the sky falling?