There certainly can be an advantage for the plants.
Obviously, we disagree, and I am weary. I wrote a long post, only to delete it. I'm aware that I can't stop you (or anyone else) from asserting that exposure to elevated CO2 levels for extended durations is safe. As always, it's up to the readers to decide what's best for them.
That's a convenient cop-out. I thought this was a friendly debate, but you basically want to end the conversation by insinuating that I'm full of shite without actually saying it. I never asserted "that exposure to elevated CO2 levels for extended durations is safe" Exposure to 50% oxygen causes severe lung damage, 100%-instant death; exposure to elevated levels of any gas is dangerous. The only disagreement I see is what you consider "elevated"? Is that anything above atmospheric, appx 421ppm? *"Direct atmospheric measurements began in 1958 at the Mauna Loa Observatory in Hawaii. At that time, CO₂ levels were about 313 ppm. Since then, concentrations have risen steadily, reaching 421 ppm in 2023."* So, above 313? 600? 800? What arbitrary number are you plucking from thin air to assert your position?
I'm not trying to say: "...that exposure to elevated CO2 levels for extended durations is safe." what I am saying though, is that "elevated levels" is completely arbitrary in this case & exposure to amounts produced by plants during their dark period is nowhere near enough to be concerned about or to raise an alarm to a newbie over. OSHA & MSHA both say to be concerned @5000ppm or above. I wouldn't want to sleep with CO2 above say 1500ppm (Some people run 1500, but i've never run over 1400, & certainly not in my bedroom) but that is just me & a number you would never see in your sleeping quarters unless you were an incompetent fool. At the top end of a 50-200ppm rise per an entire 12hr dark period, the 200 mentioned was with a bunch of plants in a sealed environment, not in a bedroom grow tent with 3 small plants & 2 people.
Maddison, your og post mentioned "
carbon monoxide, (Co)". Plants don't produce or use carbon monoxide, it's as poisonous to plants as it is to people & pets. They do however use carbon dioxide (CO2) during lights on & photosynthesis, as stated in this and other posts. They do release very small amounts of CO2 during lights out (respiration). In my very humble, personal & (past) professional opinion, you and your child do not have to be concerned about the small amount of CO2 that plants produce. If 'LGI or anybody shows me some scientific evidence to the contrary, I'll eat crow & put my foot in my mouth right after I apologize & beg forgiveness from the community...
Ok community, so now after going down this rabbit hole, and after typing all that, I'll eat some crow & apologize for my ignorance (sort of). It seems that the recommended exposure limits are lower than I thought, but still well under what a home grow (without added CO2) would produce in 12 hrs. The good news is that the effects aren't cumulative and are quickly reversed upon return to fresh air (except in the case of prolonged exposure to levels above 1000-1500ppm).
Maddison, altho I don't believe you'd ever get above 600-800ppm of CO2; being that a child is involved, I'd recommend getting a CO2 Monitor for peace of mind (even though I've never in my life heard of indoor plants being detrimental to human life).
@LoveGrowingIt I stand partially corrected. Thank you for posting on this topic and giving an old has-been something to think about and research. I have no problem being shown the error of my ways and learning new stuff, and I will readily concede when shown to be wrong in discussion or debate.
@Maddison, I apologize for train-wrecking your thread, I hope you will forgive me. You are definitely covering all your bases and I have no doubt that you'll have many very successful grows in your future. Peace.
Happy growing and good luck!
