co2 Help

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McGruppsMonsters

Well-Known Member
About to implement co2 into my room with a regular - I prefer to not burn the gas in the extra bedroom. I tested out what my temps when all exhaust\air cooling ventilation is off and it took over 30 minutes to rise over 85.

Right now I am vegging and the lights are off from 1PM to 8PM. I want to switch it to them being off from noon to eight instead...does switching their light cycle by an hour during veg stress them at all? I've done it in the past with no problems but I'm curious about your opinions.

Anyhow, my question about the c02 is as follows. I won't have a brain to monitor my temps and c02 levels, so I'll just have to use the simple math on the regulator to figure out how long it takes to fill my room with c02. My room is 9 by 11 with 7 foot ceilings. My digital timers only have 12 program settings I am a bit limited in how many times I can set fans off\c02 on.

Would filling to the room for 15 minutes with c02 and then cutting it off but leaving ventilation off for an additional 15 minutes for them to absorb the c02 give me good results?

Can anyone give experience with the regulators. I can play around with the pressure on the tank to fill it slower or quicker but I am new to c02 so a bit confused how to work this.

Have a friend who told me even small amounts of c02 helps a ton. Right now his temps are too high so he burns gas with his exhaust still on (I know, what a waste!) and still notcies an increase in yield.

I don't want to give my babies too much c02 but it's hard to find the PPM in the air without the brain hooked up. Do people who use regulators just use the chart on the back of the emitter? Not very precise I was thinking?
 
wyteberrywidow

wyteberrywidow

Global
McGruppsMonsters said:
About to implement co2 into my room with a regular - I prefer to not burn the gas in the extra bedroom. I tested out what my temps when all exhaust\air cooling ventilation is off and it took over 30 minutes to rise over 85.

Right now I am vegging and the lights are off from 1PM to 8PM. I want to switch it to them being off from noon to eight instead...does switching their light cycle by an hour during veg stress them at all? I've done it in the past with no problems but I'm curious about your opinions.

Anyhow, my question about the c02 is as follows. I won't have a brain to monitor my temps and c02 levels, so I'll just have to use the simple math on the regulator to figure out how long it takes to fill my room with c02. My room is 9 by 11 with 7 foot ceilings. My digital timers only have 12 program settings I am a bit limited in how many times I can set fans off\c02 on.

Would filling to the room for 15 minutes with c02 and then cutting it off but leaving ventilation off for an additional 15 minutes for them to absorb the c02 give me good results?

Can anyone give experience with the regulators. I can play around with the pressure on the tank to fill it slower or quicker but I am new to c02 so a bit confused how to work this.

Have a friend who told me even small amounts of c02 helps a ton. Right now his temps are too high so he burns gas with his exhaust still on (I know, what a waste!) and still notcies an increase in yield.

I don't want to give my babies too much c02 but it's hard to find the PPM in the air without the brain hooked up. Do people who use regulators just use the chart on the back of the emitter? Not very precise I was thinking?
Click to expand...
yes having your co2 on an additional 15 mins will let your plants absorb more co2,but if you dont know how much you are giving out its worthless,you clould mess things up...
 
M

McGruppsMonsters

Well-Known Member
On he back of the box it gives a simple equation to figuring ou how long it takes to fill your room. Not extremely accurate I wouldn't imagine. Could start small and see if they show signs of excess c02? I mean, plenty of people use these regulators there has to be some way to make it work, no?
 
M

McGruppsMonsters

Well-Known Member
That was my next question, so you pretty much can't go into the room while it's emitting the c02 I'm guessing? The article says even 1500 PPM of c02 is safe for humans.

As for the three hour cycle... so you mean you let the c02 out every third hour, right? I was assuming I'd do it more often than that, and also leave the exhaust off for a bit *after* letting the c02 out so the plants can absorb it.

Do you notice nice gains in your yield??
 
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unity

Well-Known Member
Hi mate, do and spend the $ on at least the counter. The cap ppm4 is crap but the counter it has works well. They sell these refurbished for $ 200 around here. Below 800-900 ppm you are wasting your time and above 2000ppm you are killing your plants. Unless your body can sense ppm count I would stick with science on this one. Below 2000 ppm you can enter the room no problem. The room NEEDS to be sealed, otherwise you will be blowing through a 20# tank in under 5 days.
Co2 works only once all other conditions have been dialed in.
Good luck mate!

Unity
 
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max420thc

Well-Known Member
i just use a co2 controller it stays where i put it..no ventalation needed of the grow room...the controller will control a gas valve to a generator or to a tank..your choice..tanks are hard to get filled..and cost alot more to use..the plants use the co2 better at higher LP can be gotten anywhere right around the corner..last fill up run me 21 dollars...co2 tanks you have to go to special place's to get em filled..such as paint ball places..the cost of a green aire co2 control is around 500 dollars..well worth it..and a generator around 300 to 500 dollars..co2 tanks can be found for 100 or so each used...the cost to fill a co2 tank last i checked was like 25 dollars.for a 40 lb tank...they do not last or generate as much co2 as a generator....if you start juicing your plant;s you will be glad you did..and you will be happy you spent the extra money on the juice set up..
 
M

max420thc

Well-Known Member
temps when running co2 can be run higher also....i set the temp for my grow when lights are on at 85 degrees...they say you can go as high as 95 .....the plants do explode in growth when you use co2....
 
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McGruppsMonsters

Well-Known Member
Temps raise the usual 10-12 degrees when doing c02 even if you aren't burning it?

As for the explosive growth, I need some... been vegging since the 13th and I'm still not at my target of 15 inches of vertical growth before I induce flowering.

I'm guessing if I can get the c02 set up in there for the last 4-5 days of veg, I will se a noticeable different in vegetative growth. Will likely just use a c02 calculator on the net. It doesn't tell you how often to run the c02 program, but how long it will take to fill your room to 1500PPM

They should handle 1500PPM fine after vegging for two + weeks, right? I want them start growing an incha day.....maybe more!!!!1
 
M

McGruppsMonsters

Well-Known Member
unity said:
Hi mate, do and spend the $ on at least the counter. The cap ppm4 is crap but the counter it has works well. They sell these refurbished for $ 200 around here. Below 800-900 ppm you are wasting your time and above 2000ppm you are killing your plants. Unless your body can sense ppm count I would stick with science on this one. Below 2000 ppm you can enter the room no problem. The room NEEDS to be sealed, otherwise you will be blowing through a 20# tank in under 5 days.
Co2 works only once all other conditions have been dialed in.
Good luck mate!

Unity
Click to expand...
I read plants can be around as much as 10K PPM for c02 without harm, because they only take in so much.

As for my room being sealed, I have a gap under my door that would allow some to sneak out but if my vents are off not much fresh air is going to be coming in, and I would think having 1500PPM of c02 in my room for about 15 minutes or so every hour would help either way.
 
U

unity

Well-Known Member
McGruppsMonsters said:
I read plants can be around as much as 10K PPM for c02 without harm, because they only take in so much.

As for my room being sealed, I have a gap under my door that would allow some to sneak out but if my vents are off not much fresh air is going to be coming in, and I would think having 1500PPM of c02 in my room for about 15 minutes or so every hour would help either way.
Click to expand...
As I understand it, the plant needs to change its metabolism in order to use the higher co2 present. So 15 min. is not sufficient from what I understand.
10k is defenitly harmfull if continously exposed. Not just to the plants, humans above 5k.
You need to stay below 2000ppm!!!

Good luck!
 
M

McGruppsMonsters

Well-Known Member
All c02 calculators are saying are there's already about 200-300 PPM in our air, and you want to add 1200 to the room to achieve a 1500 PPM in your room.

Can anyone else comment on unity's opinion?
 
M

McGruppsMonsters

Well-Known Member
Measured my room...

It's 960 cubic feet.

The main area is 7.5 feet, height is 7.5 feet, width 11.75 feet.

Also a little closet area that wasn't measured in the main roon is

3.5 feet deep, height 7.5 feet, 6.0 feet in width.

For the calculator I used online it says 960 cubic feet will get filled to 1500 PPM with 23 minutes of co2 being emitted at a rate of 2 cubic feet per hour.

Do most regulators have several release rates? I would have to imagine so.


So now, I will release it for 23 minutes..and then would you guys reccomend leaving my exhaust off for an additional 10 minutes or so if the heat doesn't become a problem?

Last time I checked I could leave my exhaust off for 32 minutes before the temperature exceeded 85 in the canopy.

hillbilly...I hear ya on the dry ice but to fill a room my size that would be a royal pain in the ass I'm guessing. c02 aint THAT expensive.
 
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DR. VonDankenstine

Well-Known Member
Most regulators have a SCFH-setting. For your size room I would just set it to 1.5scfh and have it kick off when you run your fans---you only need to run it an hour after lights on and turn off an hour before lights out.------I would recommend sealing the room and running passive light cooling then you don't have to vent your room during the lights on period and you run your exhaust during the lights out which is even better because you will lower your humidity at night. Spent the money and get an co2 controller-------DO NOT GET THE CAP PPM4----HPS BALLIST NOISE WILL FREEZE THE UNIT UP ALL THE TIME. CAP doesn't care and will not replace or back the units once you purchase them.
 
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