Co2 in flowering question

420 Boy

420 Boy

Member
Hi guys,
If the Co2 have been introduced to the grow room only in flowering (1st week) at what levels should the ppm be set?

GrowZone shows already 475

From what i understand is that if it was administrated from beginning and bringing it up gradually it should be around 800-900 ppm at this stage. But if it is just being introduced in the room can plants get a shock from high levels of ppm?
 
DemonTrich

DemonTrich

Well-Known Member
I personally.do 1000ppm start to finish in flower only. Some vary the ppm weekly up to 1500ppm.
And I hope high ppm.levels won't effect the plants. I had a regulator go bad and dump an entire 20# bottle in a few hours. Ppm was 20850ppm for about 24 hrs until I could get an exhaust fan going.
 
4

420ProBoy

Member
@DemonTrich
20k ppm that's more than lethal for plants. Poor things.

Ok so your plants don't get any noticible shock from you bumping it up to 1000ppm right away?

Did you try your same setup without co2?
Was there a big difference?
 
B

bryan oconner

Well-Known Member
depends on a lot of situations . what is your source or co2 a bottle a generator ? is it sealed up really well ? and are your temps able to get at least 85f so the plants can take advantage of the co2 . If were using a bottle I would not be using co2 . I did 1500 ppm and noticed a slight faster finish time slight bigger yield . not worth it to me . I am currently running 2200 ppm with my generator saving me well over a week of electricity about 1.5 weeks finished faster and quite a big bigger yield . crank it as high as you can get it my advice . wont hurt any thing . as long as you don't go over 2500 it might be safe over that number but I have never done it so I don't know if it is .
 
DemonTrich

DemonTrich

Well-Known Member
I'm just the opposite. I'm a bottle guy who is 9oz short of a co2 run vs my last air exchange run. I went back to the bottle.
 
M

MA MED Grower

Well-Known Member
In my sealed room I run 1400 ppm all the time. I'm seeing much bigger yields then ever. I've never heard of 475 ppm as a level to go by. Temps are important 85 is where you want to be
 
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420 Boy

420 Boy

Member
bryan oconner said:
depends on a lot of situations . what is your source or co2 a bottle a generator ? is it sealed up really well ? and are your temps able to get at least 85f so the plants can take advantage of the co2
Click to expand...
I use bottled Co2, the room is sealed pretty well and temps are 85-95 most of the time.
 
GrowerGoneWild

GrowerGoneWild

Well-Known Member
420 Boy said:
Hi guys,
If the Co2 have been introduced to the grow room only in flowering (1st week) at what levels should the ppm be set?

GrowZone shows already 475

From what i understand is that if it was administrated from beginning and bringing it up gradually it should be around 800-900 ppm at this stage. But if it is just being introduced in the room can plants get a shock from high levels of ppm?
Click to expand...
I personally like a 1000 calculated PPM, just because I was running a old school burner. It was enough for me to keep all the temps within the range I like and run enriched. Now I ran this all through flower trying for higher PPM's and when I tried to run higher PPM's I ended up with foxtails because the heat would get a bit out of control. For me it was, one of those oh shit moments when I was trying to do a 2KW hydro scrog. Really bulked everything out. Stem wrassling!.

But since every strain is different I think 1000PPM is a good start.

Now you never mentioned if you were on the bottle or a burner.

However things change, I got a new spot, and I just run big air, and when winter hits, I have a lung room solution. :)
 
Odin*

Odin*

Well-Known Member
@DemonTrich I've had a few regulators go over the years. Quick "ghetto fix" is to cut an old credit card, bend it round (to the shape of the flow regulator), scuff the reg and card with fine sandpaper, crazy glue, then crazy glue around the edge of the card. That is, if the issue was the plastic of the flow reg degrading and springing a leak.

It can be very dangerous. The first couple times were near empty tanks, last time was a full tank, about 150,000 ppm in the room. I figured out what had happened within a matter of seconds, but I already felt nauseous/light headed and had a headache. At those levels a man would go unconscious after ~30 seconds, dead in ~20 minutes. It took 4 hours for the blower to get the ppm below 5,000. Every time I went in to check (about every hour) I got my wife on the phone, just in case.

Be mindful and be careful guys.
 
DemonTrich

DemonTrich

Well-Known Member
I wasn't happy to say the least. I'm anti hydrofarm/active air from now on. Even though I'm still running a swapped out active air regulator.
 
B

bryan oconner

Well-Known Member
using co2 in veg works as well if your under very strong lights they will grow very fast . plants actually benefit from co2 in all stages from co2 even clones trying to root . and new seeds .
 
420 Boy

420 Boy

Member
MA MED Grower said:
Sorry about that just use Co2 in flower.
Click to expand...
Most people give Co2 in early veg and start around 450ppm and then gradually bring it up to about 1000ppm for 1st week of flowering and 1200-1500 by the 3rd week of flowering and then bringing it back down gradually as well
 
GrowerGoneWild

GrowerGoneWild

Well-Known Member
420 Boy said:
Bottle
Ac is big and powerful so temps aren't really an issue. I did inherit of 2 co2 burners but I wouldn't feel comfortable using for safety reasons
Click to expand...
Well.. lucky you :)

CO2 burners usually have a thermocouple built in, so they have a safety, the newer style is electronic ignite. Never had a problem with mine. Anyways, I gave that thing away in favor of more air circulation. More or less this was suggested to me from my teachers from horticulture classes I was taking.

One of the things I did have going for me is the pilot light, and so the room was "primed" with enriched co2 when the lights were off, because exhaust fans didn't kick on until temp was high, and that took a little bit to get to temp.

My own opinion is run enriched all the way till late flower. I like to kick down the temps at the end for ripening. And I'm a cheapskate :). I think I was going through 2-3 20 lb LP tanks a cycle.

Wish I had some useful info on bottled gas.
 
Aeroknow

Aeroknow

Well-Known Member
GrowerGoneWild said:
Well.. lucky you :)

CO2 burners usually have a thermocouple built in, so they have a safety, the newer style is electronic ignite. Never had a problem with mine. Anyways, I gave that thing away in favor of more air circulation. More or less this was suggested to me from my teachers from horticulture classes I was taking.

One of the things I did have going for me is the pilot light, and so the room was "primed" with enriched co2 when the lights were off, because exhaust fans didn't kick on until temp was high, and that took a little bit to get to temp.

My own opinion is run enriched all the way till late flower. I like to kick down the temps at the end for ripening. And I'm a cheapskate :). I think I was going through 2-3 20 lb LP tanks a cycle.

Wish I had some useful info on bottled gas.
Click to expand...
If the burner has only one solenoid and it gets stuck open. It won't stop until the gas runs out. LP tanks run out, NG doesn't. It's a fucked thing to have happen, trust me.

Most if not all of the newer co2 generators out nowadays have dual solenoids for this reason. If it doesn't have dual, redundant solenoids, i would get one that does.
420 Boy said:
Hi guys,
If the Co2 have been introduced to the grow room only in flowering (1st week) at what levels should the ppm be set?

GrowZone shows already 475

From what i understand is that if it was administrated from beginning and bringing it up gradually it should be around 800-900 ppm at this stage. But if it is just being introduced in the room can plants get a shock from high levels of ppm?
Click to expand...
I run bottles and generators in different setups. Haulling around 50lb bottles is the biggest problem with bottled. It costs more too, but keep in mind, it makes zero heat. I do what ever is clever for the particular setup;-)

In my bigger rooms that are setup perpetual, I set the co2 to 1000ppm, and keep it there. In my smaller, single crop rooms, I usually start the plants out at 1000, raise it to 1200 after a couple weeks, and drop it down to 600-700 the last two weeks. I don't rock the co2 in veg.
 
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