co2 newbie

queenster

queenster

Active Member
so i finally got a co2 system and finally got a controller for it and i have whent through veg with a setting 800 ppm and have had outstanding results. just started flowering 2 days ago and im trying to figure out the best time to crank the co2 up to 1450 ppm. i was thinking maybe it would be better to slowly raise it a little each week but not sure. any help will be great. thanks
 
bobbypyn

bobbypyn

Well-Known Member
if it was me, I wouldn't crank it up past 1200, cuz even at 1200ppm you're going to need alot of heat to get the plants' metabolism up fast enough to consume all that CO2; like 90 degrees! otherwise it's just overkill. even at 800ppm you're doubling your growth rates under normal conditions.
 
queenster

queenster

Active Member
ya i have the temp stable at 84 degrees but ive been reading that 1450 ppm is optimum. and your right i have gotten twice the growth as normal conditions in veg. im just trying to make sure i get all i can out of the system and the cost of the co2 fills
 
bobbypyn

bobbypyn

Well-Known Member
right on. hell, if you can get the ppm that high, go for it, but I'd let my temps ride higher and you're gonna hafta increase your watering/feeding frequency if you do so. it's called "accelerated growing." you increase all factors.
 
dannyboy602

dannyboy602

Well-Known Member
queenster said:
so i finally got a co2 system and finally got a controller for it and i have whent through veg with a setting 800 ppm and have had outstanding results. just started flowering 2 days ago and im trying to figure out the best time to crank the co2 up to 1450 ppm. i was thinking maybe it would be better to slowly raise it a little each week but not sure. any help will be great. thanks
Click to expand...
Use CO2 during the day when the lights are on. The stoma are open then.
At night turn off the burner(co2) and turn on the fan to evacuate the room
Of stale air and repeat the process in the morning when the lights go on
1500ppm is the best if you can keep it that way 12 hrs a day
 
queenster

queenster

Active Member
The system i have is bottled co2 with a regulator and the ppm3 that takes air readings all the time and only turns on the reulator if the room is low on co2 and at night the plants are not using any so it does not dispense any but i also have it on a timer so it cant come on at night even if the room needed to be injected. but the question was when to crank it up from 800ppm to 1450 or do i need to do it gradually???
 
queenster

queenster

Active Member
ya but when is the right time to raise the ppm? 2 weeks into flowering after they have done there stretch? or right away?
 
2layz2p

2layz2p

Well-Known Member
I run a CHHC 4 and I run 1500 ppm right from the get go. The day I start flower I have mine set at 1500
 
dannyboy602

dannyboy602

Well-Known Member
queenster said:
ya but when is the right time to raise the ppm? 2 weeks into flowering after they have done there stretch? or right away?
Click to expand...
I think I read co2 is best synthesized during the flowering stage. I read it increases yield by like 40%. it's so dam expensive though.
If I had to run it for the entire grow ... Veg and flower.... I'd go broke
 
2layz2p

2layz2p

Well-Known Member
I really don't think it is that in $$$$....

I get my 20 pound tank filled for $25.00 at the hydro store, my room is 20' x 8' my bottle will go 6 weeks easy.

That really don't seem so bad, does it ??
 
queenster

queenster

Active Member
thanks 2layz2p..... wow if your going 6 weeks on a 20lb bottle u must have ur room sealed well and ur exaust system sealed as well. im blowing $20 a fill every 3 weeks during the veg and i dont know yet during flowering.
no that doesnt seem bad as long as the yeild is significantly more
 
dannyboy602

dannyboy602

Well-Known Member
queenster said:
The system i have is bottled co2 with a regulator and the ppm3 that takes air readings all the time and only turns on the reulator if the room is low on co2 and at night the plants are not using any so it does not dispense any but i also have it on a timer so it cant come on at night even if the room needed to be injected. but the question was when to crank it up from 800ppm to 1450 or do i need to do it gradually???
Click to expand...
When the burner or other co2 device is turned on the PPM does rise gradually enough. You don't have to do it over a period of days or weeks. Just keep in mind that above 2000 ppm
is harmful to plants. Above 4000 is harmful to people.
 
dannyboy602

dannyboy602

Well-Known Member
bobbypyn said:
if it was me, I wouldn't crank it up past 1200, cuz even at 1200ppm you're going to need alot of heat to get the plants' metabolism up fast enough to consume all that CO2; like 90 degrees! otherwise it's just overkill. even at 800ppm you're doubling your growth rates under normal conditions.
Click to expand...

Nonsense. Heat does not figure into the photosynthetic equation. Unless there is too little heat or too much heat.
 
dannyboy602

dannyboy602

Well-Known Member
2layz2p said:
I really don't think it is that in $$$$....

I get my 20 pound tank filled for $25.00 at the hydro store, my room is 20' x 8' my bottle will go 6 weeks easy.

That really don't seem so bad, does it ??
Click to expand...
It depends. A contained area and a monitor/controller will keep usage down. The first 20lb tank I bought lasted 48 hrs .
It ran almost non stop. Then I contained the area and got a week out of ea. tank on a 12/12 schedule.
But the results were truly worth the effort.
 
2layz2p

2layz2p

Well-Known Member
My co2 will go as high as 2400 at times, it don't hurt my plants none.... at least I don't see it. I'm 12 days into this flower and have nice little buds already :)
 
dannyboy602

dannyboy602

Well-Known Member
Elevated carbon dioxide (CO2) concentration and salinity stress closes stomata and eliminates carbon uptake. Toxicity symptoms of CO2 have been observed at 10,000 ppm CO2 in the air after six days in seven plant species. Maize is an indicator plant, developing zebra-like stripes in the leaves. Root exposure for six days to 10,000 ppm CO2 or near zero CO2 had no visible effect, and plants developed normally.
My bad. It was 10,000ppm toxic to plants not 2000. Doh!
 
You must log in or register to reply here.
Top