Proper Bucket CO2 use in grow tent

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Mugwort

Mugwort

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Hello and thanks up front for any help on this subject. I bought a 4’ x 4’ x 7’ grow tent a few months ago after doing my first two grows in a closet (good to come out of the closet). I have a pretty powerful light (ViparSpectra XS2000) and another
(not so powerful) 45W led hanging as well. I added a carbon filter inline filtration system as well which keeps temp and rh stable at desired numbers.

I bought two jars of “ProCO2” and want to optimize my chances of increasing the CO2 in the tent and keeping at a level high enough to make a difference. I assume I should put the ventilation system on a timer to keep CO2 in tent for part of the day. I haven’t tried it yet but I expect temperatures in the tent without ventilation to exceed 90°. What I’m looking for help with is:

• How many hours a day should ventilation system be turned off for the jarred CO2 system to be effective?

•. I normally keep inside temperature of tent at 80-82° with lights on and 75-78° with lights off. If temperatures get up to the mid 90s during the lighted hours with ventilation system turned off am I doing more harm than good?

Any advice from some of the veteran tent growers on how they integrate a jarred CO2 source will be greatly appreciated
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Aqua Man

Aqua Man

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So forst issue will be humidity if you do that. Imo the only way to effectively use them is keep the room the tent is in closed up and put them in the room raising the co2 in the room not the tent.

Without AC, dehueys etc. You are not and I mean absolutely not going to be able to run without ventilation without causing major issues.... more than any benefit you will gain from co2.

By putting it in the room the elevated co2 will be drawn into the tent from the intakes.

If you grow in a basement you already likely to have around 1000ppm of co2.

If it's on the main floor with forced air and cold air returns imo it's not worth the time or effort.
 
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Mugwort

Mugwort

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So forst issue will be humidity if you do that. Imo the only way to effectively use them is keep the room the tent is in closed up and put them in the room raising the co2 in the room not the tent.

Without AC, dehueys etc. You are not and I mean absolutely not going to be able to run without ventilation without causing major issues.... more than any benefit you will gain from co2.

By putting it in the room the elevated co2 will be drawn into the tent from the intakes.

If you grow in a basement you already likely to have around 1000ppm of co2.

If it's on the main floor with forced air and cold air returns imo it's not worth the time or effort
So forst issue will be humidity if you do that. Imo the only way to effectively use them is keep the room the tent is in closed up and put them in the room raising the co2 in the room not the tent.

Without AC, dehueys etc. You are not and I mean absolutely not going to be able to run without ventilation without causing major issues.... more than any benefit you will gain from co2.

By putting it in the room the elevated co2 will be drawn into the tent from the intakes.

If you grow in a basement you already likely to have around 1000ppm of co2.

If it's on the main floor with forced air and cold air returns imo it's not worth the time or effort.
Thanks for the reply and advice. I had a feeling I was wasting $ & time. I live in Lake Havasu City (hottest area in country next to Death Valley) and this time of year I keep ambient room temp at 77°. It was 116° when I first posted the thread. With the tent zipped up tight and the ventilation system on highest fan setting the tent temperature remains steady at 80-82° and I can keep the humidity where I want it at between 50 to 60% by adjusting the outflow of the humidifier. You’re saying even if I limit air flow the temperature will be too high? Believe it or not, I have a poker buddy here that grows pot outside here in lake Havasu city during the summer. I wouldn’t believe it unless I saw it. So given what I have what would you recommend I do to increase the CO2 levels or at least make it a factor?
 
Aqua Man

Aqua Man

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Thanks for the reply and advice. I had a feeling I was wasting $ & time. I live in Lake Havasu City (hottest area in country next to Death Valley) and this time of year I keep ambient room temp at 77°. It was 116° when I first posted the thread. With the tent zipped up tight and the ventilation system on highest fan setting the tent temperature remains steady at 80-82° and I can keep the humidity where I want it at between 50 to 60% by adjusting the outflow of the humidifier. You’re saying even if I limit air flow the temperature will be too high? Believe it or not, I have a poker buddy here that grows pot outside here in lake Havasu city during the summer. I wouldn’t believe it unless I saw it. So given what I have what would you recommend I do to increase the CO2 levels or at least make it a factor?
So here is the thing... you have pics? Because room and ambient temp mean nothing. It's leaf temperature that matters.

Let me see what the plants saying and I can give ya some workarounds but I doubt with good airflow that your leaf temps are to high. I run my rooms around those temps.
 
tobh

tobh

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i grow in the same size tent, and i wouldn't consider touching co2. waste of effort and money if growing in a tent. CO2 is purely for sealed rooms where everything else is dialed in, and preferably running some high intensity growth setup like UC or even rockwool slabs. Too many variables in a tent to really take advantage of the boost CO2 can offer.

I'm a car guy, so I'll use a car analogy. CO2 is like NOS. Sure, you can strap a 100 dry shot to a stock Honda Civic. Sure, it'll go fast for a moment, then it'll blow the head off the block and be DOA. Whereas you can strap a 100 dry shot to a built 350 with a super charger, forged bottom end, full tuned fuel delivery system, cams, the works. That thing will run down the quarter all day long and not break a sweat. The difference is one has the basic parameters needed - an engine. The other has everything dialed in to take advantage of the extra fuel, and further, is purpose built.

Drop the CO2 idea, eat the costs. If you want to give your ladies a boost of CO2, spend more time with em.
 
Mugwort

Mugwort

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Thanks AquaMan...I’m currently growing Cali Orange, Maui Waui, and Chem Dawg. Although I planted at same time in mid May, the Dawg and Maui seeds did not pop and it took a second germination of two more seeds. Thus, the C. Orange (CO) is a couple of weeks ahead of the MW and CD. I am throwing a net over them tomorrow and trying my hand at SCROG. I’ve only been doing this for a year so I’m probably in over my head with three different strains. Their flowering time is similar in length so at least I got that on my side when I flip them. I perused your pictures...you definitely look like you’ve been doing it for awhile and have a sticky thumb. Since these pics I have trimmed and topped the CD and MW. The back plant is the Cali Orange which I topped a couple of weeks ago. They probably should’ve been topped all at the same time. I’m making a lot of mistakes and learning from them the hard way. Appreciate your input.
 
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