Why does co2 hurt my plants!?

J

joe macclennan

Well-Known Member
a mongo frog said:
r u sure they vented right when lights went on? and how did they coordinate their exhaust timers with the co2 controllers?
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a flip box could easily do that...or a cycle timer on a photosensor. some of the atmospheric controllers can do some pretty complex actions too. i'm still not convinced this is the correct thing to do though. because a few members have seen it done on large scale medi grows still isn't a home run for me. i'd like to see something more concrete. like an accredited study. WHich I am still searching for
 
Merlin34

Merlin34

Well-Known Member
Stagnant air = non fresh. To vent your house you open the windows during a breeze on opposite sides so all the fresh air blows through getting rid of all the stale stagnant air. Like during winter after your house has been closed up a while on a nice sunny day you open all the windows and air it out. That make sense? What do you mean by scrubbers?

Sent from Northern Colorado.
 
Merlin34

Merlin34

Well-Known Member
And Joe, I'm not saying that I'm right. I'm just stating how it was done where I worked. I never asked why... I just figured that's how it was always done.

Sent from Northern Colorado.
 
J

joe macclennan

Well-Known Member
Merlin34 said:
And Joe, I'm not saying that I'm right. I'm just stating how it was done where I worked. I never asked why... I just figured that's how it was always done.

Sent from Northern Colorado.
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well that's cool man. I'm not saying I'm right either. Only that almost every piece of written text on the subject says otherwise except for the one and it suggested once a day venting not several times

....that I have found so far. I need to expand my search though.


It would be easy to assume that someone setting up a 75k + grow would have their p's and q's in order.....but I have seen similar operations around here poorly ran as well. Granted none quite that large but pretty large anyway.
just because someone had the cash to start something like that doesn't make them an expert...that's all i'm saying.

and I'm certainly not one either.
 
kinddiesel

kinddiesel

Well-Known Member
I run my co2 2200 ppm. 2 gen ten burner co2 natural gas generators . I run co2 24/7 fills the entire house. temps steady 85 f . the house is sealed well. plants are in veg and flower. separate rooms. I have a lot of fans in the house mixing the air around. never exhaust the air. unless I come in to water or leave . when co2 is added the plants drink 2 times as much and you need to feed them a lot harder. in veg they drink a lot of water. and early first 2 or 3 weeks or flower they cant get enough water . and week 4 to what ever harvest is they slowly stop asking for water when they mature . mabe this is your seeing .
 
kinddiesel

kinddiesel

Well-Known Member
I think is impossible to hurt plants with co2. I have seen grow rooms with there ppm up to 5500 ! that's stupid high cant breath . but there plants are looking good. in my opinion that's to high because plants roots breath o2. but the farmer likes the results from it. standard co2 depends where you live 300 to 900 in new York. smog
 
J

joe macclennan

Well-Known Member
kinddiesel said:
I think is impossible to hurt plants with co2. I have seen grow rooms with there ppm up to 5500 ! that's stupid high cant breath . but there plants are looking good. in my opinion that's to high because plants roots breath o2. but the farmer likes the results from it. standard co2 depends where you live 300 to 900 in new York. smog
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well from what I have read you can indeed harm the plants if you go to high.
http://www.ngma.com/industry/Carbon_Dioxide_Enrichment.pdf

CO2 is harmless to humans at all reasonable dosing levels, and OSHA has established workplace standards
for worker exposure. While humans can work safely at these elevated CO2 levels, many crops start to
show undesirable growth responses at CO2 concentrations above 1,200 to 2,000 ppm.
 
kinddiesel

kinddiesel

Well-Known Member
keeps the room warm at night . and co2 will benefit plants in veg when they are under high power mh bulbs. gets insane growth . who cares about the gas bill so it will cost me 60 bucks a month for natural gas my electric bill is average 2000 a month .
 
hyroot

hyroot

Well-Known Member
When you increase co2 you have to increase o2 levels as well. Otherwise you are suffocating the plant so it can't transpire
 
J

joe macclennan

Well-Known Member
hyroot said:
When you increase co2 you have to increase o2 levels as well. Otherwise you are suffocating the plant so it can't transpire
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ahh, but in a f&d system where the rez is remotely located and highly oxygenated that o2 is introduced directly to the roots where it is needed upon every flood. Is it not?

those pics I put up a few posts ago are clearly not suffocated plants. In fact I hadn't opened my flower room for longer than ten minutes for the last three days as i've been burning sulfur in there @ night and even during the day the smell was too strong for me.
 
J

joe macclennan

Well-Known Member
kinddiesel said:
keeps the room warm at night . and co2 will benefit plants in veg when they are under high power mh bulbs. gets insane growth . who cares about the gas bill so it will cost me 60 bucks a month for natural gas my electric bill is average 2000 a month .
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I could see how co2 could be beneficial in veg if you are growing trees.

I don't see how running it during lights out would help anything though. especially during summer months where heat is NOT our friend.
 
kinddiesel

kinddiesel

Well-Known Member
you are correct about the heat. in the summer. on those hot days 90 out side .I would turn the co2 down to 800 ppm hardly turns on. its never lights out around here. the sun is always shining . keep in mind, guys if you can breath in the room the plants can breath as well. unless this guy is not using a co2 controller or its a titan controls piece of shit that jams up keeps adding co2 . I hate titan. made very cheaply trash , and its in a tent the ppm could get to a insane ppm could hurt the plants. only situation I could see with co2 hurting plants.
 
hyroot

hyroot

Well-Known Member
Roots take in oxygen. The surface of the leaf takes in co2 when awake. Takes in o2 when asleep. Think about nature. Outside air is only 2% co2.

again when awake plants breathe in co2 and put out o2. When sleeping plants take in o2 and put out co2

running co2 at lights out is wasting co2
 
kinddiesel

kinddiesel

Well-Known Member
did I for get to mention. the co2 will flood the entire house. so even up stars the co2 will get into the veg rooms . it may take a wile for the co2 to get up stars co2 sits on the floor. with all the fans I have running it will get every where . no I don't live in this house no way you could go to bed breathing 2200 ppm. might not wake up ! lol
 
J

joe macclennan

Well-Known Member
hyroot said:
When you increase co2 you have to increase o2 levels as well. Otherwise you are suffocating the plant so it can't transpire
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to my knowledge plants absorb o2 through their roots. and this is root respiration.

the transpiration process take place in the leaves. where they absorb co2 and give off o2

please correct me if i'm wrong.
edit: I see hyroot confirmed this already.
 
J

joe macclennan

Well-Known Member
hyroot said:
Roots take in oxygen. The surface of the leaf takes in co2 when awake. Takes in o2 when asleep. Think about nature. Outside air is only 2% co2.

again when awake plants breathe in co2 and put out o2. When sleeping plants take in o2 and put out co2

running co2 at lights out is wasting co2
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precisely my point. so would you please give your opinion on post #33 ?

I simply do not understand how venting co2 enriched hydroponic room that gets good oxygenated water to the roots is necessary.

PLease someone explain this to me.

I am not being facetious here. I am only looking for answers that I am missing.
 
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