CO2 enriched grow HELP!!

Good day RIU,

After few runs using CO2 burner.
Still having plant problems I can not figure it out.

Plants stunned and leaves turned yellow after two or three weeks after flip.
They look fine when I switched 12/12
I did have tried few runs with different nutes schedule. It just didnt work.

I also have another tent with pretty much the same setup. vent out the air instead of CO2 burner.
That one good pretty well.
so I assumed CO2 this the factor that cause something I missed to stunned the plants

Here are some numbers of my tent in CO2 enriched room.
TEMP: max 81F min 75F
RH: max 78% min 65%
CO2: max 1200ppm min 350ppm

I use grow tent, and I put burner out side of the tent in the room.
when burner shutdown, CO2 ppm still raise few hundred ppm.
as I mentioned above the max its 1200ppm, but I only set like 1000ppm and 50ppm dead band on the controller.

right now they are 23 days after flip.
I change out the res with fresh nutes
It looks like they are still getting worst, so I cut off burner today.
the other thing this i dont have any exhaust for the room.
I just closed door and window run mini-spilt and burner.
If not running burner, CO2 range stay around 300ppm would be enough?

have some pics of stunned plants
Any one have experienced grow in CO2 enriched environment please help!
Cheers and happy grow

prolly little to do with the c02, but your rh is too high.

this is your issue; "
They look fine when I switched 12/12
"I did have tried few runs with different nutes schedule. It just didnt work"

did you also guinea pig the other reservoir with runs with different nutes/schedules????
, or only the one that doesnt work now?

chemphlegm said:

prolly little to do with the c02, but your rh is too high.

this is your issue; "
They look fine when I switched 12/12
"I did have tried few runs with different nutes schedule. It just didnt work"

did you also guinea pig the other reservoir with runs with different nutes/schedules????
, or only the one that doesnt work now?

Click to expand...

I heard in enriched CO2 environment also need high temp and high RH
I usually lower the RH when I see flowers. but im not sure if im right tho

"I did have tried few runs with different nutes schedule"
yes Its different res, different runs, but the same setup.
At first I do half veg half bloom first two weeks, and all bloom after that.
This run I tried Veg in first two weeks, half veg half bloom for the third week. and all bloom after that.

In regards to your plants. They look like they need Magnesium (This may be K though) to me and seem to have a lot of burned tips..Could be starting to lack K or too much N, but with that color I would think maybe K needs to be upped.

What is your CO2 question?
300ppm is essentially ambient air. I would run CO2 at +1000ppm all the way up to a few weeks before harvest.

How sealed can you get a tent? Do you know if it holds and for how long?

ligrow said:

I heard in enriched CO2 environment also need high temp and high RH
I usually lower the RH when I see flowers. but im not sure if im right tho

"I did have tried few runs with different nutes schedule"
yes Its different res, different runs, but the same setup.
At first I do half veg half bloom first two weeks, and all bloom after that.
This run I tried Veg in first two weeks, half veg half bloom for the third week. and all bloom after that.

Click to expand...

I dunno about the mixing up the nutrients, thats another variable. I followed directions on the bottles and had no issue.
I augment with c02 also. I didnt always. I learned that I should perfectly dial in my space before introducing c02, otherwise more issue could arise. I burn propane to generate my c02 and it adds much humidity to the room. I control that with a dehumidifier and ac. High heat is going to make your plant metabolism jump and without the extra c02 they will visually suffer. I wouldnt increase heat purposely so that I could use c02, and find my rooms aim to keep the heat lower than 85 during lights on. cool your space, if indoors in a tent you likely dont need the added risks of c02.

NaturalFarmer said:

In regards to your plants. They look like they need Magnesium (This may be K though) to me and seem to have a lot of burned tips..Could be starting to lack K or too much N, but with that color I would think maybe K needs to be upped.

What is your CO2 question?
300ppm is essentially ambient air. I would run CO2 at +1000ppm all the way up to a few weeks before harvest.

How sealed can you get a tent? Do you know if it holds and for how long?

Click to expand...

I changed out the res with all bloom. lets see how they do tho...

Im not sure it can hold for how long

burner is out of the tent. my room this not sealed, just have door and window closed
Im not worried about the leak would waste CO2. The propane bottle its easy to get for me

My Co2 question is I think its CO2 cause some factors I missed to cause unhealthy plants.

chemphlegm said:

I dunno about the mixing up the nutrients, thats another variable. I followed directions on the bottles and had no issue.
I augment with c02 also. I didnt always. I learned that I should perfectly dial in my space before introducing c02, otherwise more issue could arise. I burn propane to generate my c02 and it adds much humidity to the room. I control that with a dehumidifier and ac. High heat is going to make your plant metabolism jump and without the extra c02 they will visually suffer. I wouldnt increase heat purposely so that I could use c02, and find my rooms aim to keep the heat lower than 85 during lights on. cool your space, if indoors in a tent you likely dont need the added risks of c02.

Click to expand...

For the temp I did tried over 85F with high RH
slightly above 80F with RH 70%
Slightly under 80F
the result wasnt good at all

My location is not suitable for setting up venting grow.
thats why I run CO2 even I grow in the tent.

its not c02, many use it in a garden, tents, sealed, unsealed, greenhouses, with no issues right?
I'm guessing when you try a detrimental temperature and rh, then see symptoms, and try another whack setting, plants still might be suffering from the first whacks?

why not stop the c02 if you believe its the issue. changing up several factors at the same time is gonna make it real hard to dial in.

you have a feeding issue, maybe ph, but prolly feed. you did the right thing thing this last time. now eliminate the c02 from the mix until plants show health again. they dont look bad to me, maybe your definition of stunted is not mine?
a plain water from the top once in awhile never hurt, nows a swell time, no worries, they'll be nuted soon as the timer gets around to it

chemphlegm said:

its not c02, many use it in a garden, tents, sealed, unsealed, greenhouses, with no issues right?
I'm guessing when you try a detrimental temperature and rh, then see symptoms, and try another whack setting, plants still might be suffering from the first whacks?

why not stop the c02 if you believe its the issue. changing up several factors at the same time is gonna make it real hard to dial in.

you have a feeding issue, maybe ph, but prolly feed. you did the right thing thing this last time. now eliminate the c02 from the mix until plants show health again. they dont look bad to me, maybe your definition of stunted is not mine?
a plain water from the top once in awhile never hurt, nows a swell time, no worries, they'll be nuted soon as the timer gets around to it

Click to expand...

I think I have all the factors right. because I have another room without extra CO2. it work fine.
As you can see on attached( they flip in the same day)

When I mentioned I change the setting of temp and RH. Its different run.
I have done three runs, with CO2 so far. never went well....

I really want to use CO2 to have extra yields. Another thing is the exhaust might have neighbor attention.
so I decided to use mini spilt and co2 burner without any exhaust for the room

yes it did cut off co2 today, but my room doesnt have exhaust. I am worried about CO2 would be too low
but my room its not really sealed, so I hope fresh air can get into the room form the gap of door.

I think they are clearly stunned if you see my another room without CO2
Really hope they getting better.
I pull around three pounds shitty buds last run.
I feel like all the hard work just turn into shit
I gotta figured it out my man

cheers

who told you c02 will add extra yields?
if everything else in the sealed room was dialed in, more c02 would only make them healthier.
added heat, added humidity...those can change plants and even ph and cause issues like we see.
the added heat increases metabolism and if other necessary resources werent increased as needed you'd suffer plants too.
if all your grows with c02 sucked, and all your grows without rocked, the choice is simple.

now, onto larger yields...thats easy. assuming every other aspect of your grow room resources is dialed in, except c02 even,
just veg longer, weeks longer even, for bigger plants, train some too for best results. I've never found a plant that didnt yield more when vegged longer. its the real trick. working for an hour in your space can increase your c02 surprisingly high too.

chemphlegm said:

who told you c02 will add extra yields?
if everything else in the sealed room was dialed in, more c02 would only make them healthier.
added heat, added humidity...those can change plants and even ph and cause issues like we see.
the added heat increases metabolism and if other necessary resources werent increased as needed you'd suffer plants too.
if all your grows with c02 sucked, and all your grows without rocked, the choice is simple.

now, onto larger yields...thats easy. assuming every other aspect of your grow room resources is dialed in, except c02 even,
just veg longer, weeks longer even, for bigger plants, train some too for best results. I've never found a plant that didnt yield more when vegged longer. its the real trick. working for an hour in your space can increase your c02 surprisingly high too.

Click to expand...

I dont know who told me, but I did yield more even they werent healthy.
I pull 2 pounds dried without adding CO2, 3 pounds shitty buds with CO2.
thats the different I see, but too bad there are still some factors I missed to cause shitty buds...

Anyways, I set CO2 at lowest point I can set on the controller.
350PPM 30 dead band
It still raise up to 550PPM
As its below 600ppm, should be fine right?
Hope they getting better

For large yirlds, I do pinch and LST. I also tried scrog before. I love the result, but as im growing in tent. the height limited make it hard when working under the net.
veg longer sure get more yields, but what I feel is without using scrog net. I have to cut off huge amount of branches that can not get enough light.
Yap I realized that when I stay in the room, CO2 level go up, but im dont check out my grow that often. I usually go every other day or longer.

cheers

chemphlegm said:

who told you c02 will add extra yields?
if everything else in the sealed room was dialed in, more c02 would only make them healthier.
added heat, added humidity...those can change plants and even ph and cause issues like we see.
the added heat increases metabolism and if other necessary resources werent increased as needed you'd suffer plants too.
if all your grows with c02 sucked, and all your grows without rocked, the choice is simple.

now, onto larger yields...thats easy. assuming every other aspect of your grow room resources is dialed in, except c02 even,
just veg longer, weeks longer even, for bigger plants, train some too for best results. I've never found a plant that didnt yield more when vegged longer. its the real trick. working for an hour in your space can increase your c02 surprisingly high too.

Click to expand...

Wouldn't adding CO2 decrease your veg time? and thus increase your yield?

NaturalFarmer said:

Wouldn't adding CO2 decrease your veg time? and thus increase your yield?

Click to expand...

yes, it can decrease veg time and increase end yield. Just make sure your roots are keeping up. I do hydro so I can check that out.
If someone says no it can't, then forget about it... I run CO2. I know.
CO2 is great stuff. I run at 1000-1200 ppm. 1500 ppm is a myth.
Actually I am at 400 ft altitude and grow in a basement. My starting PPM is 500. Basements usually have more since CO2 falls to the lowest point.

NaturalFarmer said:

Wouldn't adding CO2 decrease your veg time? and thus increase your yield?

Click to expand...

likely if the other resources were provided correctly.

both of my rooms share their air 24/7("S" curtain in between, scrubbers back and forth) so my veg gets c02 aug. 12 hours daily. nope, I'd never tell anybody to add it till they were already happy with their results. it wont speed up anything in flower or veg necessarily and doesnt make better weed necessarily, but surely makes for happier healthier plants in happy healthy rooms all around in my experiences. that does equate to better exp for me and mine.

I put a plant in a vac'd bag with a c02 meter and filled it to 1500. we watched how fast the c02 was depleted without leaks compared to the bag with no plant.(which also depletes, slowly). before than I grew in my home with no c02 added, I was steady at around 350ppm, but not within the plants, I couldnt move enough air to bring that space up too much, but wasnt concerned, just learning. I saw/felt no losses.

when I grew in my new space outdoors building indoor grow rooms, my ambient was near the same with using outside air, until I was working in there, doors swinging occasionally and massive air movement. but not within the plant leaf areas again. I didnt notice losses then either. it was easy for me, I did it. then I noticed healthier plants, larger leaves, more metabolism, better brix numbers in the living leaf, and my beneficial beasts increased too, in the root zones of new pots. My soil, air, and plants are happier now. I like happy. if I mistakenly run out of propane, and I have, I've gone a week or so without replenishing, so its not life or death for plants, ut I notice the plant mood without it compared. thats my take

Well, I suppose each has their own results. As for me, I have had yield increases and veg sessions are not so much shortened but increases plant size compared to without, which causes for a fuller plant going into flower. I run in hydro so my results may be different than yours due to this. I am artificial all around.
The increased size results in my end product being greater.
I attempt to squeeze every bit of what I can out of mother natures possibilities. I am a firm believer that you are not making a plant go beyond it's genetic means but fulfilling it's genetic possibility.
The only way to do this is through providing every means possible that actually works.
For me this has meant addition of myco, aminos, and Organic PGR's / Steroids (Tria and Chitosan) Chemical PGR's are all junk and shouldn't be used anyway do to their harmful affects. IDk even understand why anyone would use GA3 or PAC. PAC is some nasty stuff and ruins cannabis. GA3 maybe for seed dormancy but Chitosan will help anyway. Just go get new seeds or a clone. Trust me that strain ain't that valuable.

"so I assumed CO2 this the factor that cause something I missed to stunned the plants"

I think that's the problem. You're assuming co2 is the problem. What good does it do to put the co2 burner outside the tent? How can you determine if your plants are being exposed to co2?
Why don't you discuss your nutrients, as it looks like that's your problem.

ligrow said:

Good day RIU,

After few runs using CO2 burner.
Still having plant problems I can not figure it out.

Plants stunned and leaves turned yellow after two or three weeks after flip.
They look fine when I switched 12/12
I did have tried few runs with different nutes schedule. It just didnt work.

I also have another tent with pretty much the same setup. vent out the air instead of CO2 burner.
That one good pretty well.
so I assumed CO2 this the factor that cause something I missed to stunned the plants

Here are some numbers of my tent in CO2 enriched room.
TEMP: max 81F min 75F
RH: max 78% min 65%
CO2: max 1200ppm min 350ppm

I use grow tent, and I put burner out side of the tent in the room.
when burner shutdown, CO2 ppm still raise few hundred ppm.
as I mentioned above the max its 1200ppm, but I only set like 1000ppm and 50ppm dead band on the controller.

right now they are 23 days after flip.
I change out the res with fresh nutes
It looks like they are still getting worst, so I cut off burner today.
the other thing this i dont have any exhaust for the room.
I just closed door and window run mini-spilt and burner.
If not running burner, CO2 range stay around 300ppm would be enough?

have some pics of stunned plants
Any one have experienced grow in CO2 enriched environment please help!
Cheers and happy grow

Click to expand...

I am seeing a slight Mag issue. Tips and Stripes.

polishpollack said:

"so I assumed CO2 this the factor that cause something I missed to stunned the plants"

I think that's the problem. You're assuming co2 is the problem. What good does it do to put the co2 burner outside the tent? How can you determine if your plants are being exposed to co2?
Why don't you discuss your nutrients, as it looks like that's your problem.

Click to expand...

sorry my English type it wrong, and my English its poor too
It would be
to be in CO2 enriched grow room, I missed some factors that I can not correct to cause stunned plants.

I have an intake fan set under the burner suck air into the tent. I also have a sensor in the tent.
so Im sure plants being exposed co2.
by set the burner outside of tent. PPM go up 2-300ppm when burner shutdown by the controller, and I only set 30-50 dead band
which means, i only set like 900ppm on controller. and it get to 1200ppm.
do you think co2 ppm swing in that range whould cause plants stunned?

For nutes, I use GH maxi Series.
with some cal/mg
EC 1.4 PH 6.0 slightly go up
res temp 69F

your ec might be a little high. the co2 wouldn't stun plants. you don't need to run it all the time, just when lights are on.

I agree with everything Polishpollack has stated.

My EC
Early Veg 0.5 EC
Mid-Late Veg 0.8
Early Flower 0.8
Mid Flower 0.9
Late Flower 0.5

My Nutes:

Jacks Professional 5-12-26 (3g/Gal)
Jacks Cal-Nit 15-0-0 (2g/Gal)
Epsom Salt (1g/Gal)
Canna PK 13/14

Microbe Life Photosynthesis Plus (Veg thru Flower) (This stuff smells worse than a rotting corpse)
Advanced Nutrients Golden Goddess (Veg thru Flower)
Advanced Nutrients PH Down 0-44-0 (love this stuff. 10ml / 55 Gal drops my PH 0.3-0.4 PH)
Chitosan (Flower only)

Foliar:
Humboldt County's Own Snow Storm 1ml /Gal and 2ml /gal in the last week. Twice a week
(If you can't get Snow Storm, CannaBoost will work the same for Foliar)

Sheeps, are you hydro? That NPK ratio is Jack's hydro.
http://www.jrpeters.com/products_/16491/19322-jack-s/19712-5-12-26-hydroponic.html

ligrow, what soil are you using? I'm assuming you're using soil, not hydro.