Co2 never used it but have a question

im in a sealed room. Never used co2 but have to now. I've read so many different Ppm levels. What would be the best ppm for day and night?? Thank you

at night turn it off . plants don't use higher co2 levels at night there is no sun . in the say there are a lot of opinions out there from 1000 ppm to 3000 ppm. personally I crank my meter up as high as it will go . but I use a burner not a bottle. if you have a burner I suggest 2000 ppm . if a bottle then 1500 for the first 6 weeks and then crank it up to 2000 ppm. seams like it shaves off a week or more mature faster , my opinion and experience . waste of money running co2 at night .

for got to mention . higher co2 at night will not hurt any thing . the plants just cant make any use of it you do not need to vent the room out .

bryan oconner said:

for got to mention . higher co2 at night will not hurt any thing . the plants just cant make any use of it you do not need to vent the room out .

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It HURTS your wallet!!!

Co2 in veg is not worth running either!!! The costs FAR out weight the returns!

Do you know that to make Co2 work correctly you need to run the area HOT and MOIST?

To effectively use 1500ppm (what you want to run). The temp has to run at 86 - 92 F and have a RH of 70 min!

The best way to control that is to have and use an environmental controller and a Co2 ppm controller

https://4hydroponics.com/autopilot-digital-environmental-controller

and

https://4hydroponics.com/atlas-7-co2-controller

OR
Just this

https://4hydroponics.com/autopilot-digital-co2-controller-fuzzy-logic

There are a few fanatic Co2 users on here and there are those like me who simply find it costly and then find other ways to do better.......Co2 is not the answer to making the best/most product. Unless you have the RIGHT amount of lighting, your trowing out your money anyway!

I've run it. I'm set up to run it by generator and I haven't the need......

temps do need to be over 80 f so the plants can open up to absorb the co2 or ingest idk how they take it in lol . just know its needs to be toasty lol . also strongly suggest not running over 60% wet in late flower . chance mold . I actually seen great improvement in veg using co2 saves weeks if you can get the temps hot and under strong lighting 600 watts and up.

Thank you! My room is 12' x 20'. i do have an autopilot controller. I've set the day ppm to 1500 it has a night setting I've setto 50. There is not an option for 0. I'm running tanks not a burner. Temps have been running 85-87. I have a 3 ton and 2.5 ton mini split ac's humidity stays 40-43% lights on and same with lights off.

1200PPM is fine

MA MED Grower said:

Thank you! My room is 12' x 20'. i do have an autopilot controller. I've set the day ppm to 1500 it has a night setting I've setto 50. There is not an option for 0. I'm running tanks not a burner. Temps have been running 85-87. I have a 3 ton and 2.5 ton mini split ac's humidity stays 40-43% lights on and same with lights off.

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You need to water more often to help get that RH up! I learned to water a metered amount everyday at lights on to carry it to just the next day and still have the soil "damp" but nor dried "out".....This helps the RH in a closed environment and using gas.....
I wouldn't run my temp under 86!

bryan oconner said:

temps do need to be over 80 f so the plants can open up to absorb the co2 or ingest idk how they take it in lol . just know its needs to be toasty lol . also strongly suggest not running over 60% wet in late flower . chance mold . I actually seen great improvement in veg using co2 saves weeks if you can get the temps hot and under strong lighting 600 watts and up.

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I'm sorry but I found years ago that it's NOT worth the cost to gas during veg!
Longer spacing and other things along with NO "real" time decrease "worth" the effort...Look, Even Ed R and Jorge say no...Puts me in good company eh?

神秘人 said:

1200PPM is fine

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That's good for a 600w......If your running 1K's - go up to 1500 to max out the benefit.....

that's why everybody has an opinion. there is no wrong or right answers . just your preference . co2 is not down to a science yet. I prefer running co2 in veg as well . using 1000s of watts I see a major difference . idk what lighting others use in veg defently wont see a difference using t5 of cfl lighting

bryan oconner said:

that's why everybody has an opinion. there is no wrong or right answers . just your preference . co2 is not down to a science yet. I prefer running co2 in veg as well . using 1000s of watts I see a major difference . idk what lighting others use in veg defently wont see a difference using t5 of cfl lighting

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Sorry dude, but you can do it with T5 lighting....3-6 tube banks would work. 3-8 tube banks would work. You can achieve some mighty high U/mol counts by simply adding light banks..

Take a look at this set up -

https://www.rollitup.org/t/light.853779/

It's fine if you choose to use gas during veg.....Your not following every book in prints advice.....and mine....but, that's fine!

ive done t5 in co2 no difference at all . in other gardens it might make a difference if they can get the environment correct . with t5 I could not achieve that . so the co2 did nothing at all but kill my gas bill .

No need for co2 at night,what EC you at

My Sentinel is set at 1250ppm. Works for me.