CO 2 use

Ganja XL

Ganja XL

Member
Hello All,

I have a question regarding the use of co2 in a growroom , i like to ask how many hours a day a grow benefits most of adding co2 into a room.
I have been told that one hour when lights after are on till one hour before lights go out is ideal.
But i like to be sure and ask you fine people.

Thanks in advance , warm greetings from Holland

Stay safe ppl !
 
OldMedUser

OldMedUser

Well-Known Member
Greetings from Canaduh! canadian.gif

How is ventilation in your grow space? If constant air flow then added CO2 is useless. I only use CO2 during the stretch when the plants feed and grow much more than normal. To do that I raise my temp sensor to 90F so the exhaust fan won't come on and remove the CO2. Ideally you want a sealed grow room so there is no leaks or exhaust. That takes air conditioning/dehumidifying and added CO2 to make it work.

If using a CO2 controller then it will come on when the lights do and maintain a set level of CO2 until the lights go out. Again if there is ventilation the CO2 won't help. I made an alcohol lamp and burn methyl hydrate in it to supply lots of CO2.

:peace:
 
OldMedUser

OldMedUser

Well-Known Member
xox said:
titan controls the spartan series makes a co2 controller that can run on a timer rather than using a photo sensor.
Click to expand...
Pretty much any of the controllers can be put on a timer. I have one but have only used it to see how high the CO2 would get using my alcohol lamps and realized I don't need to waste money on a tank. $10 for a 4L jug of methyl hydrate at the hardware store and I'm good for a room full of plants for a whole grow. I had to make a smaller version using a shoelace for a wick as the tiki lamp wicks cranked the CO2 over 1500 in 15 min.

CO2Controller03.jpg


:peace:
 
Ganja XL

Ganja XL

Member
OldMedUser said:
Greetings from Canaduh! View attachment 4904039

How is ventilation in your grow space? If constant air flow then added CO2 is useless. I only use CO2 during the stretch when the plants feed and grow much more than normal. To do that I raise my temp sensor to 90F so the exhaust fan won't come on and remove the CO2. Ideally you want a sealed grow room so there is no leaks or exhaust. That takes air conditioning/dehumidifying and added CO2 to make it work.

If using a CO2 controller then it will come on when the lights do and maintain a set level of CO2 until the lights go out. Again if there is ventilation the CO2 won't help. I made an alcohol lamp and burn methyl hydrate in it to supply lots of CO2.

:peace:
Click to expand...
Hello OldMedUser,

Thank you for your reply, i appreciate that a lot.
In this still need to be constructed room, everything will be what you described, with airco/dehumidifyer and so on - temp controlled.
It will be a tank with liquid co2 for me.

Take care
 
OldMedUser

OldMedUser

Well-Known Member
Ganja XL said:
My question still remains, how many hours a day - and can we humans work inside while we have a 1500 ppm co2 filled in the growroom ?
If the schedule is one hour after lights turned on and one hour before lights go off, i wanted to know if that is the right schedule or is that too long ?

take care
Click to expand...
As long as the lights are on the plant can use the CO2. It doesn't have to be 1500ppm to help the plants grow. Just doubling it from normal to 800ppm will enhance growth. To get the most out of it at 1500 you need higher temps, feed and light. It's like running your car at redline and things go bad fast if anything goes bad.

:peace:
 
Ganja XL

Ganja XL

Member
Mohican said:
OSHA has established a Permissible Exposure Limit (PEL) for CO2 of 5,000 parts per million (ppm) (0.5% CO2 in air) averaged over an 8-hour work day (time-weighted average orTWA.)
Click to expand...
doesnt co2 become dangerous at 4000ppm - for humans ?!
 
thisbuds4u101

thisbuds4u101

Well-Known Member
I personally wait two hour after lights on run for two hours I do this off on until last two hours but I’m using a 4 burner generator. Big difference I average 1450 ppm works pretty dam good I might say
 
A

Apalchen

Well-Known Member
If your room is sealed enough the c02 likely won’t kick on until an hour or so after the lights kick on. At least mine doesn’t, during dark period plants let off c02. My room is almost always at 1600+ ppm when lights first kick on. I wait an hour two after lights on to water and by then it usually starts kicking on.

like others have said if your not sealed with ac and dehuey then it’s kinda pointless to run c02.
 
MidnightSun72

MidnightSun72

Well-Known Member
Ganja XL said:
My question still remains, how many hours a day - and can we humans work inside while we have a 1500 ppm co2 filled in the growroom ?
If the schedule is one hour after lights turned on and one hour before lights go off, i wanted to know if that is the right schedule or is that too long ?

take care
Click to expand...
I've been doing it past few weeks no problem Lol. I just keep my system primed with THC to protect me from any CO2 going in my lungs.
 
DoubleAtotheRON

DoubleAtotheRON

Well-Known Member
Ganja XL said:
My question still remains, how many hours a day - and can we humans work inside while we have a 1500 ppm co2 filled in the growroom ?
If the schedule is one hour after lights turned on and one hour before lights go off, i wanted to know if that is the right schedule or is that too long ?

take care
Click to expand...
You can safely work in a room with 1500 ppm of CO2. OSHA standards are very high up there. Humans expel 30-50,000ppm of CO2 every time we exhale. I usually have my Titan set to 1200-1400ppm during peak flower. If we have 4-5 people in the room working for a couple of hours, I'll see the meter hit 2300 or so, and the Titan will not kick in, as I have set it to 1200-1400. A typical school classroom with 30 kids breathing with render about 4000-5000ppm if the door is closed. Submarines will read around 7000-8000ppm, and they stay in that environment for months at a time. So breathe easy... it's safe. Especially if you're only in there a couple of hours a day. Currently in week 9, well starting 10 now... I have it set at 800ppm. They still eat CO2 during lights off, and I'll see a nightly drop to around 450ppm.. As soon as the lights kick on, the Titan kicks it back up to 800... well, 900 because I have a 100 deadband. Ideally, you want a controller that can keep your CO2 at a set level during lights on, and the photocell will shut it down during lights out.
 
Ganja XL

Ganja XL

Member
Thank you all for your advice and comments, it helps a lot. I have a better idea now - thank you all again and stay safe !

greetings from the Netherlands !
 
Roy O'Bannon

Roy O'Bannon

Well-Known Member
We use CO2 tanks to push string through long pipe runs of 4" for the wire pulling rope to be pulled in with. It can make you feel short of breath and burns a bit if you get too much. Fresh air fixes immediately.

So, If you walked in a room that was dangerous, you would notice immediately and couldn't stay there comfortably imo.
 
downhill21

downhill21

Well-Known Member
DoubleAtotheRON said:
You can safely work in a room with 1500 ppm of CO2. OSHA standards are very high up there. Humans expel 30-50,000ppm of CO2 every time we exhale. I usually have my Titan set to 1200-1400ppm during peak flower. If we have 4-5 people in the room working for a couple of hours, I'll see the meter hit 2300 or so, and the Titan will not kick in, as I have set it to 1200-1400. A typical school classroom with 30 kids breathing with render about 4000-5000ppm if the door is closed. Submarines will read around 7000-8000ppm, and they stay in that environment for months at a time. So breathe easy... it's safe. Especially if you're only in there a couple of hours a day. Currently in week 9, well starting 10 now... I have it set at 800ppm. They still eat CO2 during lights off, and I'll see a nightly drop to around 450ppm.. As soon as the lights kick on, the Titan kicks it back up to 800... well, 900 because I have a 100 deadband. Ideally, you want a controller that can keep your CO2 at a set level during lights on, and the photocell will shut it down during lights out.
Click to expand...
I get the same.
 
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