C02 Question

**Ivana Smokealot** · 08-23-2012, 06:52 AM

I just picked up a C02 regulator, Tank and an additional timer. I have a 3' X 3' X 7' tent with a 400w HPS cool tube. I have a fan on the cool tube running whenever the light is on, and a exhaust blower on 24/7. I just hoohed up the C02 yesterday for the first time. The exhaust blower was timed to go off for an hour while the C02 cam on for an hour. Then exhausted for 2 hours and repeated the cycle for the 12 hours the light was on. In the tent i have a digital thermometer / hygrometer, and during the time when the exhaust blower is off the temps went up to 88f (normally it is maintained at about 75f) i know higher temps are best when using C02 so that is fine, but my humidity goes up to 95% (normally its about 65%) while the exhaust blower is off. how concerned should i be with the humidity? I usually run 4 plants at various flowering stages so i have perpetual harvesting. I do not want to end up with rot or mold issues. Do I worry or am I being overly cautious?

**auldy66** · 08-23-2012, 06:56 AM

hey
your grow nearlly exact same as mine. Only Im just hanging bottles with yeast and sugar mix, until I pick up a co2 emitter.
Something I was worrying about is, do you worry about the co2 getting exhausted out of the grow, with your extractor fan?

be interesting to see what info comes back about your humidity.

good luck

**Ivana Smokealot** · 08-23-2012, 07:01 AM

i got the C02 tank regulator off amazon for about 80.00 so not too bad. I dont worry about exhausting the C02 as it just goes outside, so i think its safe. i have my exhaust fan off while the C02 is being brought into the tent so the plants can utilize it fully. then exhaust at end of C02 cycle to bring in fresh air. Thats when my humidity climbs through the roof.

Gool luck with you grow!

**superstoner1** · 08-23-2012, 07:20 AM

dehumidifier

**Ivana Smokealot** · 08-23-2012, 09:27 AM

in a 3 x 3 tent, really?

**auldy66** · 08-23-2012, 09:59 AM

Originally Posted by Ivana Smokealot

i got the C02 tank regulator off amazon for about 80.00 so not too bad. I dont worry about exhausting the C02 as it just goes outside, so i think its safe. i have my exhaust fan off while the C02 is being brought into the tent so the plants can utilize it fully. then exhaust at end of C02 cycle to bring in fresh air. Thats when my humidity climbs through the roof.

Gool luck with you grow!

was thinking more of how u r wasting the co2.. just a thought, good luck wth ur grow
auldy66

**Ivana Smokealot** · 08-23-2012, 10:14 AM

how do you see wasting?

**auldy66** · 08-23-2012, 10:28 AM

Originally Posted by Ivana Smokealot

how do you see wasting?

did I read wrong, I thought I read that u had ur co2 on at the same time as exhaust fan? hey, Im askin not tellin, as I also worried(maybe too strong a word. thought) the same thing, was it worth having c02 in grow while my exhaust fan was on

**auldy66** · 08-23-2012, 10:31 AM

Originally Posted by auldy66

was thinking more of how u r wasting the co2.. just a thought, good luck wth ur grow
auldy66

just read this back, I hate quick messages for this. it did sound as if I as telling u.. me bad ....:0/

**Ivana Smokealot** · 08-23-2012, 11:22 AM

nope i didnt take it as you were telling me at all....I have timers shutting down exhaust fan/s when C02 comes on. The C02 is on for an hour then the girls are left for another 1/2 hour to utilize all or as much as possable C02, then the exhaust fan/s come on and refresh the air for two hours. Then the cycles are repeated fot the entire 12 hour light cycle.

i think the exhaust fans on while C02 is increased is a waste though, plants will not get that much of a C02 increase to be usefull.

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