CO2 - best time to use

jijiandfarmgang

jijiandfarmgang

Well-Known Member
deadgro said:
Undoubtedly.. Obviously.. It's all anecdotal since every plant is different. I've yet to see any scientific, variable-controlled studies supporting the benefits of adding co2 or amending the atmosphere.

FYI, plants use photons, not lumens.
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Maybe you should do a web search. There are many peer reviewed scientific studies.

- Jiji
 
Jeeyah

Jeeyah

Well-Known Member
The first 5 weeks of flower they love that shit. Just do not use it the last couple weeks when you're frosting and ripening them. Co2 is for growth.
 
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mrblu

Well-Known Member
i just set up co2 for my 8x12 room for 2 tanks my startup cost was about 800 bucks. 2 tanks so I have one while the other is getting swapped out. co2 has become my bottleneck and summertime had become a pain.

i recommend having your lights vented through cooltubes or hoods air coming from another room and exiting to another or wherever you used to vent to. also a dual hose air conditioner so your AC isnt sucking out your carbon. also a dehumidifier from lowes or whatever hooked to a hosepipe draining somewhere else. because you would have to empty it constantly and that gets old.
 
greasemonkeymann

greasemonkeymann

Well-Known Member
ServingSize1oz said:
I disagree with the fact that if not using 600w or better there is no difference. It undoubtedly has benefits even on one plant under a 150w, they're simply less because you're only growing one plant. Having that ideal ppms with a 400w and 300ppms in two different grow rooms with all other variables the same the 1500ppm plant would obviously grow faster. C02 increases the maximum amount of lumens the plant can use, and a 400w bulb still has the capacity to provide over 9000 lumens per square inch.
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this is simply not true, there is no way you could provide enough light with a 150w anything to need CO2.
Photosynthesis is governed by it's weakest link, in that case the light. Not a 150.
That's like the fat kid that takes the protein drinks and expects to gain muscle, it's only needed if the plant is consuming every PPM of the CO2 and is needing more because all the other factors are already being made.
I used co2 for yrs, and it's simply not worth it, not unless you are growing in cold areas and don't mind having your room sealed up for a couple hrs at a time.
ina greenhouse? under the sun? Hell ya.
But under a 150w light? no way you are needing co2.
dbdweller is spot on.
problems with temps, humidity, transpiration, etc.
 
S

ServingSize1oz

Active Member
You can easily reach those limits if you're doing everything right with one plant under a 150w bulb though. Granted I'd say almost no one with the capability to grow a plant well enough to actually need CO2 under a 150w bulb would not be using a 150w bulb, my point wasn't that you should still be using Co2 under a shitty bulb, the point was that you can get a sealed environment and a high enough photon output on your plant for it to benefit the plant from a smaller bulb than a 1000w - even a 150w in say a 1.5x1.5x4 sealed grow tent - with one plant and in fact a 600w is more efficient than a 1000w.
 
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harris hawk

Well-Known Member
mrblu said:
i just set up co2 for my 8x12 room for 2 tanks my startup cost was about 800 bucks. 2 tanks so I have one while the other is getting swapped out. co2 has become my bottleneck and summertime had become a pain.

i recommend having your lights vented through cooltubes or hoods air coming from another room and exiting to another or wherever you used to vent to. also a dual hose air conditioner so your AC isnt sucking out your carbon. also a dehumidifier from lowes or whatever hooked to a hosepipe draining somewhere else. because you would have to empty it constantly and that gets old.
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Good information - keep it comming
 
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harris hawk

Well-Known Member
ServingSize1oz said:
You can easily reach those limits if you're doing everything right with one plant under a 150w bulb though. Granted I'd say almost no one with the capability to grow a plant well enough to actually need CO2 under a 150w bulb would not be using a 150w bulb, my point wasn't that you should still be using Co2 under a shitty bulb, the point was that you can get a sealed environment and a high enough photon output on your plant for it to benefit the plant from a smaller bulb than a 1000w - even a 150w in say a 1.5x1.5x4 sealed grow tent - with one plant and in fact a 600w is more efficient than a 1000w.
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Have you ever heard of "The Enhancer" CO2 aresol can ????
 
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mrblu

Well-Known Member
i doubt a tiny can would do anything lol. i use a a 20lb compressed tank every 2 weeks probably. i have 3 tanks 140 a peice but only 18 bucks to swap out for full ones.

im thinking about getting a burner and moving this setup to a smaller room where it would be more efficient.
 
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harris hawk

Well-Known Member
mrblu said:
i doubt a tiny can would do anything lol. i use a a 20lb compressed tank every 2 weeks probably. i have 3 tanks 140 a peice but only 18 bucks to swap out for full ones.

im thinking about getting a burner and moving this setup to a smaller room where it would be more efficient.
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Really don't know how to start CO2 "therapy" Cost is high? Know a 3by3 grow space is to small for a tank set up -example. What would you say to be the minumin grow space that tanks can be used properly ? Keeping it simple what would a person need to start with and still being not to costly? another words start-up cost?
 
indicat33

indicat33

Well-Known Member
No expert on Co2 here, but I believe I remember reading Hight Times, and according to the article. you generally want to start using Co2 around 3-4 wks in. :joint:
 
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harris hawk

Well-Known Member
daybreaker said:
Titan co2 burner with titan fan c02,humidity controller.Seal that room up and watch the magic.um 4 1000 hps...;)
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Thanks guy's approx cost "datbreaker"
indicat33 said:
No expert on Co2 here, but I believe I remember reading Hight Times, and according to the article. you generally want to start using Co2 around 3-4 wks in. :joint:
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3-4 weeks in vegation ? thinking that one uses co2 thru out grow? until last 2 weeks of flower and use in veg, per-flower and flower ? Thanks all
 
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