Why does co2 hurt my plants!?

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Sticky760

Well-Known Member
joe macclennan said:
what do you mean by cea room?


what do you mean by this?


what a well written post. I doff my cap to you sir. Let me digest this info for a minute.


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Controlled Enviromental Agriculture or CEA. Completely sealed off room with no in and out vents and complete control of the enviroment allows for adequate control.

Maybe I didn't explain to we'll myself lol. My co2 is set at 950ppm "I just started flowering" so once the burner kicks on at 950 it will go up to 1300 ppm of co2. Once the plants have uptaken the co2 the room drops to 950 again and the burner comes back on to 1300 again. I leave a gap so while there up taking co2 the ppm should drop in the room making for more oxygen " breathing room" so they don't stay at a constant co2 levels there's a gap.
Lol thanks joe, my buddy that works with me he's new to it and he looks at me like I'm crazy when i go off on my grow rants lol
 
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Sticky760

Well-Known Member
joe macclennan said:
so basically what you are saying is that if they look good and healthy and your o2 levels are high enough and your co2 levels are high enough venting a room is unnecessary?

and if they are good healthy plants they should produce enough oxygen along with the o2 given while watering?

if I see signs of droop or overwatering then I should either 1: vent my room intermittently to draw in more o2 for the roots or 2: increase aereation of water? both together would be best i'm assuming.

or even possibly add another watering per day too if the rootzone can handle it too?
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If your having oxygen problems yes I would say that would be the best bet to do so. More oxygen in your water transpires to oxygen for the plant and maybe 10 minutes of air coming in an hour would help.
 
J

joe macclennan

Well-Known Member
Sticky760 said:
Controlled Enviromental Agriculture or CEA. Completely sealed off room with no in and out vents and complete control of the enviroment allows for adequate control.

Maybe I didn't explain to we'll myself lol. My co2 is set at 950ppm "I just started flowering" so once the burner kicks on at 950 it will go up to 1300 ppm of co2. Once the plants have uptaken the co2 the room drops to 950 again and the burner comes back on to 1300 again. I leave a gap so while there up taking co2 the ppm should drop in the room making for more oxygen " breathing room" so they don't stay at a constant co2 levels there's a gap.
Lol thanks joe, my buddy that works with me he's new to it and he looks at me like I'm crazy when i go off on my grow rants lol
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makes total sense. venting a healthy/balanced co2 enriched room seemed odd to me. My co2 controller has like a 400ppm deadband in it too. It's one of those preset ones.

On @ around 900 off@ around 1300 too.

what do you know about the sensitivity of co2 controllers? I've wondered for a while how accurate mine is.
 
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joe macclennan

Well-Known Member
Sticky760 said:
If your having oxygen problems yes I would say that would be the best bet to do so. More oxygen in your water transpires to oxygen for the plant and maybe 10 minutes of air coming in an hour would help.
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I'd say I don't have o2 problems then and I don't need to vent as these latest plants are the biggest and most lush and healthy i've ever had.

thank you for taking the time to explain this.

edit: I've actually been thinking about trying to add another flood/day things look so good.
 
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Sticky760

Well-Known Member
Well I have only used autopilot so I don't know how quickly it reads compared to others but I'd have to imagine it's as good as the controller you are buying cause the co2 monitor is the most expensive piece in a enviromental controller. I'd say mine drops to 945 the lowest once the burn kicks on and takes maybe a minute and a half to fill but that's based off room size and burner size. I had to place mine outside read and calibrate the co2 of outside first then had to adapt it to my room. It'd be minimal how off its reading is I would think unless the sensor is damaged I'd be only a 50 ppm difference +/- or there'd be alot of angry growers lol
 
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Sticky760

Well-Known Member
It's a frigdaire 25,000 Btu window/wall unit. I had someone build a mini shed with filters For Air Going In And out to it to kill possibly any mold from outside going into my room but they built it wrong so I had to take it down :/. But it has a pollen filter built in so I probably didn't need the shed in the first place lol
 
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joe macclennan

Well-Known Member
sticky, you write and post as if you are sure of yourself here but I see in your thread just a month ago you were questioning whether fresh air exchanges were necessary or not...

still going through springerlink...but i'm subbed to your grow anyway :)
 
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Sticky760

Well-Known Member
Cause I like to prove points to my buddy who works with me. We used to run an in and out fresh air exchange room before it was switched to the cea. He wanted to still have an in and out fan going while we were burning co2. Doesn't make any fucking sense. So I figured I'd get input from other people so he could read and not be as sceptacle, cause I didn't spend 5 grand to have him want to switch it back to a modified agricultural enviroment. 2 essay papers on CEA and he never questioned me again hahaha
 
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Sticky760

Well-Known Member
joe macclennan said:
sticky, you write and post as if you are sure of yourself here but I see in your thread just a month ago you were questioning whether fresh air exchanges were necessary or not...

still going through springerlink...but i'm subbed to your grow anyway :)
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Right on thanks for the sub I'm having issues with the promix hp right now but I've been trying to get to the bottom of it. 10$ bag of growers gold never did me wrong like this promix is lol ph is off micro nutrients get locked out then the macro so I emailed the manufacturer to see what's wrong cause this has never happened since I used promix. Ph is always 6.2-6.3
 
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joe macclennan

Well-Known Member
Sticky760 said:
It's a frigdaire 25,000 Btu window/wall unit. I had someone build a mini shed with filters For Air Going In And out to it to kill possibly any mold from outside going into my room but they built it wrong so I had to take it down :/. But it has a pollen filter built in so I probably didn't need the shed in the first place lol
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most window units don't draw in fresh air.
 
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joe macclennan

Well-Known Member
so the abstract in this study directly contradicts your opinion about co2 killing roots sticky. In fact is says just the opposite.

http://link.springer.com/article/10.1007/BF00017090

[h=1]Root to shoot ratio of crops as influenced by CO2[/h]
[h=2]Abstract[/h]Crops of tomorrow are likely to grow under higher levels of atmospheric CO2. Fundamental crop growth processes will be affected and chief among these is carbon allocation. The root to shoot ratio (R:S, defined as dry weight of root biomass divided by dry weight of shoot biomass) depends upon the partitioning of photosynthate which may be influenced by environmental stimuli. Exposure of plant canopies to high CO2 concentration often stimulates the growth of both shoot and root, but the question remains whether elevated atmospheric CO2 concentration will affect roots and shoots of crop plants proportionally. Since elevated CO2 can induce changes in plant structure and function, there may be differences in allocation between root and shoot, at least under some conditions. The effect of elevated atmospheric CO2 on carbon allocation has yet to be fully elucidated, especially in the context of changing resource availability. Herein we review root to shoot allocation as affected by increased concentrations of atmospheric CO2 and provide recommendations for further research. Review of the available literature shows substantial variation in R:S response for crop plants. In many cases (59.5%) R:S increased, in a very few (3.0%) remained unchanged, and in others (37.5%) decreased. The explanation for these differences probably resides in crop type, resource supply, and other experimental factors. Efforts to understand allocation under CO2 enrichment will add substantially to the global change response data base.
 
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Sticky760

Well-Known Member
I have a vent setting which vents it out the room. Fresh for fresh air. And closed for closed air circulation. People who are smart would check humidity levels of outside every morning to help factor in there growrooms to help cool it. Get a weather app it'll save you money.
Happy growing
 
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Sticky760

Well-Known Member
I just read that post before I started talking to you then you read what I said and didn't even think twice about that. So you have some issues my dude you remind me of my buddy. The shoot there referring to is how far the plant stretch outwards which would coincide for what I said earlier about root generation and degeneration. Read your article more carefully. It says there "maybe difference under certain conditions" what are the co2 levels based off of? You throw this in my face with no real depth or facts. If you read other articles from 1990 lol they are based off of a 700 ppm enviroment which I'm sure none carried cannabaceae which is a form/class of cannabis. So if you can find one on that that'd be cool until then it's speculation.
 
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joe macclennan

Well-Known Member
I only put it up for discussion. FUnny you are gonna start with heckling already. I am aware of what the abstract said.

and honestly, everything you have posted could be considered speculation as well.

You have presented no concrete evidence to back up your theory.

no sense getting all bent here man.
 
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