Poor co2

AnnFrank

AnnFrank

Well-Known Member
Hi, I have poor co2 levels in my room, it’s 2x1 room with a 6” inlet and 8” outlet hyper fan on tick over both vented to outside (inside the ten temps around 28/30 degrees humidity 45%) , I was getting readings of 4/500 ppm about a week ago and now it’s down around 250 and nothings changed except the plant size , I’ve got a giant bottle of co2 with the solenoid/ regulator to use if need be. my readings for ppdf at the top of the canopy are around 1000 with the lights working at 50%, I’m just a bit worried my plants are not getting the most out the light output. Any help getting my co2 levels higher is appreciated. Thanks
 
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Kola_Kreator

Well-Known Member
If you are exhausting the tent air and drawing fresh air in from outside your room the levels should not be as low as 250. There's no point in supplementing unless you run a sealed grow. Take the meter outside it should read 350-400. If it's reading under 320 outside then the meter is faulty
 
AnnFrank

AnnFrank

Well-Known Member
Kola_Kreator said:
If you are exhausting the tent air and drawing fresh air in from outside your room the levels should not be as low as 250. There's no point in supplementing unless you run a sealed grow. Take the meter outside it should read 350-400. If it's reading under 320 outside then the meter is faulty
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i did try to recalibrate but was inside the garage the tents in, I’ll try pull the probe and retry,
 
AnnFrank

AnnFrank

Well-Known Member
Kola_Kreator said:
If you are exhausting the tent air and drawing fresh air in from outside your room the levels should not be as low as 250. There's no point in supplementing unless you run a sealed grow. Take the meter outside it should read 350-400. If it's reading under 320 outside then the meter is faulty
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many ideas on how to increase the co2 volume in a ventilated room?
 
AnnFrank

AnnFrank

Well-Known Member
ProPheT 216 said:
Exchange more air. Stop believing that meter, if your moving enough air k.i.s.s.
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Ha love that, I took the unit outside and calibrated it, put it back and it was reading higher from the low 200’s back up to 4/500’s. I tuned all the fans off and let the co2 fill the room, set the limits on the unit and dialled the gas in and put the fans back on and watched the readings and the room is staying up around 800ppm, so fingers crossed
 

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calvin.m16

calvin.m16

Well-Known Member
Don't add co2 if your going to vent the room. It's a waste of time/money. Look into co2 burners before investing in a tank style. I do not recommend doing co2 tank swaps cause they're way more of a PITA, way heavier and risk contam if the tanks your getting were used in a grow or stored outside.

If your venting due to heat and you take growing somewhat serious or plan to continue doing it then I'd suggest looking into a mini-split ductless air conditioner. Goes on the wall in your grow room and your tent(s) can just circulate within the same room. It's around a $900-1000 investment for a decent size room but it's well worth it.
 
AnnFrank

AnnFrank

Well-Known Member
calvin.m16 said:
Don't add co2 if your going to vent the room. It's a waste of time/money. Look into co2 burners before investing in a tank style. I do not recommend doing co2 tank swaps cause they're way more of a PITA, way heavier and risk contam if the tanks your getting were used in a grow or stored outside.

If your venting due to heat and you take growing somewhat serious or plan to continue doing it then I'd suggest looking into a mini-split ductless air conditioner. Goes on the wall in your grow room and your tent(s) can just circulate within the same room. It's around a $900-1000 investment for a decent size room but it's well worth it.
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hi, thank u, yeh I thinkI sorted it, I’m venting to outside due to smell (the room/lung it’s in is right under the neighbours bedroom window and they have already reported a friend for drug driving after he was smoking a joint outside in his van), I turned the fans down and recalibrated the sensor and got the level up to what I needed, I’m trying to take it serious, or get the best crop I can as it is just a cash crop for me. the tanks stored outside the tent so contamination isn’t much of a problem, will have a look conditioner tho. Thank u
 
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Grower1974

Member
and here I am always trying to reduce my indoor CO2 levels daily. My home is super airtight, and without a door or window cracked open, the CO2 PPM's fluctuate between 900-1700. Inside my lung room/tent, it always 700-1100 PPM.
 
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nxsov180db

Well-Known Member
If you're venting you'll never have to worry about co2 levels. Im using a 6" duct booster to vent 200 sq/ft of canopy and that keeps it at 400ppm. I know people that grow that don't vent at all, the house itself with 2 people living in it and a dog keep the co2 in the bedroom he grows in with a 4x8 grow at like 600-800.
 
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1212ham

Well-Known Member
Grower1974 said:
and here I am always trying to reduce my indoor CO2 levels daily. My home is super airtight, and without a door or window cracked open, the CO2 PPM's fluctuate between 900-1700. Inside my lung room/tent, it always 700-1100 PPM.
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1700 is rather high. A friend built a tight house and experienced very high humidity in the winter, soon after he installed an air-to-air heat exchanger to bring in fresh air. I suggest searching 'healthy co2 levels indoors'

"Good ventilation is important to help protect people from COVID-19 and for healthy indoor environments in general. Carbon dioxide concentrations indoors can provide information about ventilation but need to be interpreted carefully."

 
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Grower1974

Member
1212ham said:
1700 is rather high. A friend built a tight house and experienced very high humidity in the winter, soon after he installed an air-to-air heat exchanger to bring in fresh air. I suggest searching 'healthy co2 levels indoors'

"Good ventilation is important to help protect people from COVID-19 and for healthy indoor environments in general. Carbon dioxide concentrations indoors can provide information about ventilation but need to be interpreted carefully."

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Yeah. I’m aware of CO2 standards and levels. Not sure what Covid has to do with it though. That card was already played.

My winter humidity is far from high here in the north. I need operate humidifiers from mid Dec to April. We have FHA heating.
 
calvin.m16

calvin.m16

Well-Known Member
Grower1974 said:
and here I am always trying to reduce my indoor CO2 levels daily. My home is super airtight, and without a door or window cracked open, the CO2 PPM's fluctuate between 900-1700. Inside my lung room/tent, it always 700-1100 PPM.
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I've ran 2200 PPM co2 in a barn before, plants grew insane. No signs of stress, if anything you'll get the opposite unless your environment is shitty. I shoot for high 70 temps and low 50 humidity. Works good. No VPD chart required. The plants are my chart at this point.
 
AnnFrank

AnnFrank

Well-Known Member
Hi, sorry for the stupidly late reply to all this, ive managed to dial the room into 1300ppm and it’s vented (so I’m sure some will say don’t bother or it’s a waste) , I’ve got the outlet 8” on 10% tick over and the inlet 6” at 20% so good negative pressure still, temps for the room are around 28*c and humidity at 60% and the plants are absolutely loving it, literally watching the grow overnight
 
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