Co2
- Thread starter The_Dude
- Start date
a mongo frog
Well-Known Member
Depends on room size. I think 10x10x9 or smaller a tank. Burner if something like 2 car garage or bigger. Controller absolute must.
Budley Doright
Well-Known Member
I’ve used tanks but as mango says, it depends on size. There are lots of things to consider, one being temps and a way to cool the space as you won’t be venting. I just felt I should concentrate more on dialing in the grow before I added it. I have a linear controller with a step valve to vary flow but it still got pricey running bottles.
Budley Doright
Well-Known Member
I use a Honeywell c7232 but it’s not plug and play at all and I use it in reverse logic dc linear mode. Nope not plug and play but free 
.
.
a mongo frog
Well-Known Member
Im having luck with the Auto Pilot. Please don't buy the new Sentinel stuff.
Budley Doright
Well-Known Member
That’s typically what controls CO2. You will also maybe want to open ventilation when lights are off and turn off co2, that’s optional but more ecomical. So many things you can do. That’s one of the reasons I grow indoors, I love tinkering lol.
Dr. Who
Well-Known Member
That's what math is for!
You use given formula's to set "on" times to reach your desired ppm...You don't need that high end, big money ppm metering controller.. They don't even last as long as the one's where you set the on times..
I get the feeling you need to be told that ppm's over 1300 are a waste of time too. You see that the amount of available light intensity, RH, and temp's,,,All effect the ability of the plant to actually use the increased Co2.
By far, very far. Most people can not get the light intensity required to effectively use 1500 ppm! 1300 is the ceiling point for in home effective use of Co2.
Next would be temps and RH. To effectively use co2 enrichment at 1300 ppm...You need to have the controller set for 88 - 90 deg F and 80% RH....
ANY use of ppm's over 1300,, your wasting money!
good luck
BigHornBuds
Well-Known Member
What’s the problem with Sentinel?
What’s concerned there new stuff ?
The_Dude
Well-Known Member
Damn, 80% humidity? That seems a little high.
BigHornBuds
Well-Known Member
I’ve played around a lot with temps n ppm n RH%
I like 80-84f , 1100-1300ppm , 40-60%
I’m using sentinel controllers and am 100% happy
I would get a controller that works with a timer vs a photocell
Plants don’t want 1300ppm as soon as the lights turn on .
I like 80-84f , 1100-1300ppm , 40-60%
I’m using sentinel controllers and am 100% happy
I would get a controller that works with a timer vs a photocell
Plants don’t want 1300ppm as soon as the lights turn on .
a mongo frog
Well-Known Member
Cheap made. Warranty takes millions of months to come through. If i get a chance ill take a pic of the old chhc4 i have and you can see the difference in how they are made from 7 years ago.
Budley Doright
Well-Known Member
Nope not high at all
Dr. Who
Well-Known Member
There is something called the Vapor Pressure Deficit. It is used in growing for optimal temps tied to RH.
The thing is. In regular, non-gassing gardens. That VPD chart can be kinda detrimental and allow for increased chances of PM...Big time. You use lower RH values...
BUT,
In gassing, it should be followed to the letter! Temps and RH, regulate the effective use by the plant, OF the higher C02 levels.
Have those temps or RH out of sync and you don't let the plant use that extra Co2 effectively!
VPD chart
