Need Co2 advice

[sum1cull911]

what do you think the max co2 ambient level 'could be 'just with a door/window open /closed ......without a co2 add.....non sealed room....
plenty of flow.....w/exhaust fan suckin it thru....?
w/circ fan also.......
basement w/grow room within it....good clean fresh mountain air......guess i really need some type of metering $........to really know eggs ackley

I've got a co2 meter, and it wasn't cheap. Very accurate. I've never seen it go past 700 in a normal sized room, with 4 people in it.

sum1cull911 Reviewed by sum1cull911 on 01-07-2011. Need Co2 advice Just picked up a tank of Co2 and a regulater and need to know when and how it will work best...setting etc. want to try to do it right the first time for sure.. lites run about 18 hours a day in this room. We strung some 3/16 hose into the T5 room and drilled holes about 2 inches apart under the T5..when would be the best time to run Co2 in this room ? also do we need to turn the fans and can fan off when we turn the Co2 on..? Main grow room under the 1000 sodium lite we where Rating: 5

[sum1cull911]

thanks for the input..........good meter $ ?....brand name?......
low tech baking soda method?.......co2 bags?.....

Extech Co200 Desktop Indoor Air Quality Carbon Monoxide Monitor

I dont know how to create a link. But this is the exact one I have.

[MtnLionCO]

stupidest thread of the year?

[MtnLionCO]

the relationship is between the human being and the plant.

people give off co2 when they breathe.

its not a broken water heater or a mine shaft.

larger space means less fluctuations hence easier to control.

small animals dont affect it much at all.

i know its calibrated correctly because it drops to 400ppm if i open all windows, or take the meter outdoors to test it.

[MtnLionCO]

@ sum1cull911 you must be living a different planet than i am.

[MtnLionCO]

Extech Co200 Desktop Indoor Air Quality Carbon Monoxide Monitor

I dont know how to create a link. But this is the exact one I have.

wow u actually have a monitor, it must not work right or something, or youre not reading it correctly

[MtnLionCO]

I've got a co2 meter, and it wasn't cheap. Very accurate. I've never seen it go past 700 in a normal sized room, with 4 people in it.

ridiculous!

[MtnLionCO]

CO2 is not called for in veg. It must be a closed room as TurboALLWD said or your just throwing money away.

CO2 is really for flowering, should only be run when the lights are on. A common setup is to use a controller, set ppm to 1500, and top temp to be 90. Then, the controller will come on and dump the air in the room, and when finished, bring ppm back to 1500. Plants like it hotter when there is CO2, and can tolerate and thrive in higher temps.

CO2 should be NOT be run the last 2-3 weeks as your buds will not swell.

hth

or you could run the co2 in the secondary room where the cold air is and transfer air via fans/ducting 24/7 with no cycling.

[MtnLionCO]

If you don't/can't have sealed room, then supplemental co2 is pointless. Normal air quality already has approximately 300-500 ppm. Depending if you live in a city or not. The point of supplemental co2 is to get the ppm up there around 1500. You might as well sit your tanks outside your front door and let em open. It's not necessary to supplement co2, just a kick in the plants but to get growing.

thats not true, if the rest of your house is closed up the room doesnt have to be "sealed".

who grows in a sealed room anyway, you would need to run an air conditioner if your room was sealed (which creates more heat). and how would you control the humidity? mine stays constant at 40%, it doesnt go up to 80% and then trigger an exhaust fan. and my co2 stays constant at 1200 (from me breathing) it doesnt fluctuate around.

maybe i have bigger lungs than you i dunno.

[MtnLionCO]

what do you think the max co2 ambient level 'could be 'just with a door/window open /closed ......without a co2 add.....non sealed room....
plenty of flow.....w/exhaust fan suckin it thru....?
w/circ fan also.......
basement w/grow room within it....good clean fresh mountain air......guess i really need some type of metering $........to really know eggs ackley

if you have a basement with unsealed room thats IDEAL, just set up the co2 outside the grow space and transfer air. dont listen to these guys on here! get the monitor first so you know exactly whats going on.