New to C02 some advice would be great guy's.... unis regultor's 20lb tank

Danthebull said:

Hi everyone. Im currently growing 24 ladys and i want to introduce some C02 in to my room.

1 week in to 12/12

Sealed room.

Room temp day 31 degrees

Night temp 18-21 degrees.

6" carbon filter running full time.

2 x 12 " Os fans.

2 x 4 " intake

1 x 5 " intake.

I have a unis regulator and a 20lb tank of C02.

I would like to know if anyone could assist me in the use of this.

Some of my questions are as followed.

Q1 can i run the C02 constantly?
Q2 can i run it with the exhaust?
Q3 is the temp too high or too low for C02?
Q4 I have another 5" exhaust that i want to put in the room to go with the other. How will this affect me in using the C02 Good idea to put it in or not?

Thanks for taking the time to read this thread.
Any help would be greatly appreciated.

My grow below!

https://www.rollitup.org/newbie-central/302501-hi-everyone-my-first-grow-post3783983.html#post3783983

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JeffersonBud said:

I take it that you are in Celsius and not Fahrenheit. Your daytime temp is 87 degrees F. Depending on your plant, it may accept those temps or slow it's growth. I would recommend lowering it to 85 max. @ those temps co2 is a MUST for proper growth.

Also, in order to run a sealed room, you need to seal your intake. A proper sealed room is exactly that. No intake or exhaust! If you are running air cooled lights, you must seal them properly so no ambient air in the room gets vented out your sealed hood exhaust.
If your room is too hot then you need to run an exhaust on a temperature probe and time your c02 properly to shut off during those exhaust times. Put a flap on the exhaust to block air from leaving when the exhaust is off. When the exhaust turn on the flap will open.

Calculate your co2 http://www.hydroponics.net/learn/co2_calculator.asp.

Thanks for the info bro.

Ok so i have a few issues to rectify. I will have to put the exhaust on a timer for when i put the C02 on. i will also put the intakes on the same timer so that the intakes and exhaust are off for the duration of C02 dose.

Another couple Q's..... when i put the C02 on, how long should it stay on for.

my room is 2.3 x 2.1 x 2 = approx 8.5 m2 which is setting Number 5 on the unis controller.

Any info on this again would be much appreciated..

Dan

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Danthebull said:

JeffersonBud said:

I take it that you are in Celsius and not Fahrenheit. Your daytime temp is 87 degrees F. Depending on your plant, it may accept those temps or slow it's growth. I would recommend lowering it to 85 max. @ those temps co2 is a MUST for proper growth.

Also, in order to run a sealed room, you need to seal your intake. A proper sealed room is exactly that. No intake or exhaust! If you are running air cooled lights, you must seal them properly so no ambient air in the room gets vented out your sealed hood exhaust.
If your room is too hot then you need to run an exhaust on a temperature probe and time your c02 properly to shut off during those exhaust times. Put a flap on the exhaust to block air from leaving when the exhaust is off. When the exhaust turn on the flap will open.

Calculate your co2 http://www.hydroponics.net/learn/co2_calculator.asp.

Thanks for the info bro.

Ok so i have a few issues to rectify. I will have to put the exhaust on a timer for when i put the C02 on. i will also put the intakes on the same timer so that the intakes and exhaust are off for the duration of C02 dose.

Another couple Q's..... when i put the C02 on, how long should it stay on for.

my room is 2.3 x 2.1 x 2 = approx 8.5 m2 which is setting Number 5 on the unis controller.

Any info on this again would be much appreciated..

Dan

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That link is a room calculator. You want to figure out the regulators Cubic Feet Per Hour (CFH), or how fast it releases its co2. Once you have this, type in the other variables and it will do the rest. If you can fork over the $$$, get a fuzzy logic by C.A.P. or a Sentinal Co2 probe. It will monitor the co2 in the room and spray the bottle as needed giving you optimal co2 at all times. It can also be hooked to a timer to turn off when your exhaust is kicking on.

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JeffersonBud said:

Danthebull said:

That link is a room calculator. You want to figure out the regulators Cubic Feet Per Hour (CFH), or how fast it releases its co2. Once you have this, type in the other variables and it will do the rest. If you can fork over the $$$, get a fuzzy logic by C.A.P. or a Sentinal Co2 probe. It will monitor the co2 in the room and spray the bottle as needed giving you optimal co2 at all times. It can also be hooked to a timer to turn off when your exhaust is kicking on.

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When I said the first part I meant that it will calculate, based on your CFH and room size, how long the regulator stays on for. Then do it every three hours the lights are on (or 4 times a day starting at lights on).

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JeffersonBud said:

Danthebull said:

That link is a room calculator. You want to figure out the regulators Cubic Feet Per Hour (CFH), or how fast it releases its co2. Once you have this, type in the other variables and it will do the rest. If you can fork over the $$$, get a fuzzy logic by C.A.P. or a Sentinal Co2 probe. It will monitor the co2 in the room and spray the bottle as needed giving you optimal co2 at all times. It can also be hooked to a timer to turn off when your exhaust is kicking on.

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Hi thanks for the input mate.

the reg i have has its own dial on how much to emit in to the room. I worked out the size of the room and used the booklet to adjust the reg to the correct setting. It periodically emits the Co2 in to the room. it does it like every 3 minutes for a shot blast of 5 seconds or so. My concern is that altho my room is well sealed it has 2 exhausts and 3 inlets. And my set up need's to have these running. But im wanted to know weather it should be shut down whilst the Co2 emits its juice. i think it would be a wise decision for me to invest in a PPm reader so i can see what its at when in use.

any more info would be great!!!!

Thanks again everyone dan

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Danthebull said:

JeffersonBud said:

Hi thanks for the input mate.

the reg i have has its own dial on how much to emit in to the room. I worked out the size of the room and used the booklet to adjust the reg to the correct setting. It periodically emits the Co2 in to the room. it does it like every 3 minutes for a shot blast of 5 seconds or so. My concern is that altho my room is well sealed it has 2 exhausts and 3 inlets. And my set up need's to have these running. But im wanted to know weather it should be shut down whilst the Co2 emits its juice. i think it would be a wise decision for me to invest in a PPm reader so i can see what its at when in use.

any more info would be great!!!!

Thanks again everyone dan

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Welcome! Glad I can help.

Co2 is heavier then air so you should have a nice fan blowing in the room as well to mix it up. Maybe one on the floor pointing upward? I understand your room needs these intakes and exhaust for cooling, but you will be losing your co2 when they are open, letting the air into to cool the room. It's a give or take situation and with your current set-up. It is technically half sealed. This is where you don't want to be. If your intakes are open and your exchanging the room with fresh air, then the plants will be receiving co2 all the time.

Co2 is @ 300-500ppm in the air your breath at 1 ATM, or sea level. So your regulator is calculating for 1200 ppm increase. You should switch to a cool tube that draws air in through a sealed intake (or a sealed hood), through the cool tube and light, and out your room. Close the other intakes and exhaust, and see if the room gets over 85. If it does, then you will need to supplement with either a window ac unit, mini split AC, or liquid cooled lighting methods.


So either seal the room completely and use co2, or just exchange the air. Your competing with 2 of the most important things the plant needs. Fresh co2 and proper temperature control.

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Danthebull said:

i have looked at changing to cool tube's and think i will be giving this a try in the future. But for now i think i will be closing the vent and exhaust to see what the temp raises to. And taking it from there. Im hoping that the temp's dont go too high as they are already running at there max. but the Lady's seem to be loving it in there. I think they are monsters. what do you think? here are a few pic's of my grow. 9 days in to flower.

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JeffersonBud said:

I think they look spectacular! You have great canopy evenness and wonderful green growth. Yes, they def. are loving it

Co2 @ 1500 ppm's will result in a higher yield. Often it is a difficult situation to seal a room with good temps and keep co2 @ 1500 ppms. If it does get to hot in there, then stick with what you got! Making a microclimate is no easy task my friend but it can be done for sure. You are right though, experiment and see!

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