Couple of C02 questions.

[Dank Demon]

Hey peeps,

I am a newbie to the old c02 growing and I am getting a lot of mixed results using the search engines to answer a few questions I have, so I thought I would ask the experts one here. I will also probably be adding more questions to this thread as I go.

Thanks for any replies

1. I have a pretty sealed room which I can make more sealed if necessary, I have a split system 12000 BTU A/C system to control room temps. Do I need an exhaust fan set up at all? I will be using an Eco Technics Unis controller and bottle.

2. Before entering the room will I need to exhaust it as I plan on trying to get the room to stabilize at 1500 ppm, but do not want to die while tending to the plants lol.

3. As I can control my own environment I can use a dehumidifier at night to reduce humidity to 40% RH but what shall the ideal temperature be in the room using c02 as I have heard good results from low and high heat?

4. I am planning on constructing a c02 feed halo line that runs beneath the LED lights along the entire length of the SCROG, but will fine evenly spaced holes be better in tubing? Or what about using 8mm porous tubing that people use as air curtains or for what they are intended for a drip feeding plants?

That's all for now folks

 

[Snype]

Hey peeps,

I am a newbie to the old c02 growing and I am getting a lot of mixed results using the search engines to answer a few questions I have, so I thought I would ask the experts one here. I will also probably be adding more questions to this thread as I go.

Thanks for any replies

1. I have a pretty sealed room which I can make more sealed if necessary, I have a split system 12000 BTU A/C system to control room temps. Do I need an exhaust fan set up at all? I will be using an Eco Technics Unis controller and bottle.

2. Before entering the room will I need to exhaust it as I plan on trying to get the room to stabilize at 1500 ppm, but do not want to die while tending to the plants lol.

3. As I can control my own environment I can use a dehumidifier at night to reduce humidity to 40% RH but what shall the ideal temperature be in the room using c02 as I have heard good results from low and high heat?

4. I am planning on constructing a c02 feed halo line that runs beneath the LED lights along the entire length of the SCROG, but will fine evenly spaced holes be better in tubing? Or what about using 8mm porous tubing that people use as air curtains or for what they are intended for a drip feeding plants?

That's all for now folks

1. You don't need an exhaust fan in a sealed room.

2. You do not need to exhaust the room when entering a 1500ppm room. 1500ppm is a waste and I never go over 900 ppm CO2 with 1000 watters. I used to use 2000 ppm of CO2 and now I use 600-900 ppm.

3. My sweet spot for temperatures is 78-82 F when lights are on. Those temperatures are at the very top of the plant canopy.

4. I don't use tubing with CO2. I use fans instead.

 

[GreenPlant]

4.But with the Airline.
As I said I'd had the Airline from the Regulator (non Unis) hanging Slightly above and behind the fan

 

[buffinski]

If you use c02 you can increase temp, feed, and light. Look at each as a limiting factor so if you increase one you increase them all. Some like to keep there temp low around 78 degrees but to get the benefit of CO2 personally I would have it at least 85 degrees but under 90 degrees.

 

[GreenPlant]

Ha Ha! Know that name [must be Polish] (!)

(Mariokart wan' it lol )

Yep Hotter Temps Feasible with CO2
No Real Heat with the LEDS Though :-/

 

[buffinski]

Your 1200w lights will put out all the light you need I woud then suggest after you have your c02 running is start temp at 80 degress then turn it up a couple of degrees and note whether the plants are growing faster Chemdog genetics can take quite high feed so you should be able to push them pretty hard and get some serious colas going. When I was really blitzing the CO2 i took temp up into the nineties and they grew like crazy, not suggesting you go that high and if you air on the lower side 84 Degress would be fine but I grow at that with no CO2. Good thing is with climate controll you can experiment and get the perfect temp that suits you, as you say in a sealed room dehumidifing is essential some use sulphur burners to combat pm etc but easier to make sure room is sterile and theres none in there to start with. Greenplant says hes messaged me for you so tomorrow hopfully.

 

[willyweed]

hi ya mate ,i have done a lot of reading on this subject : 900-1500 lights on seems to be the rough guide,think it is very light dependant, more light more everything else seems to be a good rule.
co2 is a heavy gas ,so i would guess you would need a couple of fans blowing up from the floor area to stop it just sitting on the floor .
i have used it (the home made sugar yeast water) and will say it made things bigger! how much bigger i could not say, perhaps 5-10 % weight wise.
looking forward to your grow.
keep up the good work. willyweed
ps it does help with extra heat !

 

[Piff Rhys Jones]

If you use c02 you can increase temp, feed, and light. Look at each as a limiting factor so if you increase one you increase them all. Some like to keep there temp low around 78 degrees but to get the benefit of CO2 personally I would have it at least 85 degrees but under 90 degrees.

Good info mate.

Peace

 

[lost in a sea]

i have seen an improvement by going up to 1500ppm (or over 900 anyway) just after bud set once they have stopped stretching and around weeks 5-7 when growth is really fast and all is perfect,, but the temps as has been mentioned can then spike if it's a warm time of year, with ac your better off obviously but when it's really hot sometimes they only lower the temps by a couple celcius so be ready to adjust things as you go along and watch your "dials" ..

i'd say if you have a system with a readout then yeah 900s good to aim for..

on limiting factors, if your plants aren't growing fast because any number of other factors are holding back the photosynthetic rate then co2 is useless and then detrimental.. they could be deficiency of all the macro and micro nutrients, over/under watering, pH, humidity, temperature, substrate and water hardness, certain pests etc

carbon monoxide CO is dangerous because it has a higher affinity for haemoglobin than oxygen but CO2 is different and i doubt you could build a room sealed enough to get 40,000 ppm to build up and you would have to be in it for ages.. as snype says you don't need an exhaust fan but then you may need to run a dehumidifier during the day..

i've spent many hours sat around smoking with a butane gas fire accidentally raising the ppm up to over and around 13,000 ppm with the co2 system on as well.. you could tell, barely..

you don't need to rain it down on them it comes out pressurised and mixes quickly.. i bet a common trick is to wedge tubing in the back of a oscillating fan grill so it blasts it at them as it turns,, thats what ive done on many grows anyway..

i've used the eco unis's for years,, good company.. in a really well sealed room if i didn't have a sensor i would set a unis one setting lower than your area at least..

happy growing

 

[GreenPlant]

Haemoglobin!

Sounds like



F'in iPhone Up side down arnt they

 

[Snype]

I'm not sure if anyone here has read this thread by spurr:

The facts about CO2 ppm: don't use 1,500!
https://www.icmag.com/ic/showthread.php?t=221893

Personally I used to run 2,000 PPM. When I went down to 600-900 PPM, quality and yields increased.

 

[lost in a sea]

just citing a couple studies doesn't convince me of anything, that is through experience of rifling through too many thousands of studies.. in terms of rubisco activase inhibition from what i can tell heat stress and water stress are far more likely to be causing it even if you have your co2 ppm is over 1000..

and plants in the first place did evolve in an atmosphere well over 1000ppm..

 

[Snype]

just citing a couple studies doesn't convince me of anything, that is through experience of rifling through too many thousands of studies.. in terms of rubisco activase inhibition from what i can tell heat stress and water stress are far more likely to be causing it even if you have your co2 ppm is over 1000..

and plants in the first place did evolve in an atmosphere well over 1000ppm..

No one is trying to convince you of anything lost. This topic is for the creator of this specific thread and anyone else who is interested. It's all about spreading the wealth of information to the masses.

 

[GreenPlant]

Yea Good (true) Information Gathered is Always Valuable

 

[Dank Demon]

Thanks for all the replies and sharing of the knowledge its much appreciated. My PPM Desk top monitor came today as well as the Unis controller

Here is the monitor I got incase anybody is interested: http://www.airconcern.co.uk/extech-...r-p-415.html?gclid=CMCV2Ij7yLgCFTMQtAodSUcAeQ

 

[Dank Demon]

A picture of the monitor:

http://www.airconcern.co.uk/extech-...r-p-415.html?gclid=CMCV2Ij7yLgCFTMQtAodSUcAeQ

Using this I should be able to tweek the Unis controller allowing for the pitch in the loft to set the ideal PPM.

 

[GreenPlant]

Well smart.Temp and R/H as well.

You do find these Useful Gadjets

Nearest I had was a manual Oxy test kit
Fill the test tube with air lol

 

[lost in a sea]

yeah sometimes though information when presented recklessly becomes disinformation.. and imo spurr presented alot of information recklessly..

also just to mention i've watched plants grow happily enough in co2 ppms over 4000 from heating through winter, i don't advise it i had no choice.. so all i'm saying is this so called inhibition at over 1000ppm, that has not been shown in cannabis in any studies, (only imo) can't be that bad..

 

[Snype]

yeah sometimes though information when presented recklessly becomes disinformation.. and imo spurr presented alot of information recklessly..

also just to mention i've watched plants grow happily enough in co2 ppms over 4000 from heating through winter, i don't advise it i had no choice.. so all i'm saying is this so called inhibition at over 1000ppm, that has not been shown in cannabis in any studies, (only imo) can't be that bad..

I feel you. You said you went through thousands of studies. Maybe when you get some time, you can put some of your references here for people to have a look at what you found. No one said that too much CO2 would kill your plants or anything like that but it's not like there was a side by side in 2 perfect closed rooms with the exact same conditions except CO2 rates. Personally I would like to do that experiment and probably will at some point. No one is saying that you can't have healthy plants at 1500 ppm, but how will the plants differ? How will yield differ? How will density differ? There's so many questions and it's good to just know the real truth. I know some people here don't like spurr but the documents that he sited in that specific thread are pretty convincing and it's hard to go against that. I didn't see that as reckless. That's why I would like to see where your studies came from. Not hating on you in any way so don't take it as an attack.

I just read a bunch of pages of spurrs posts from many threads and I completely disagree that his information is reckless. It seems that he can be taken as offensive at times by the way that he speaks but he has a lot of valuable knowledge and references to back them up.

 

[lost in a sea]

not thousands of studies on co2 and its effects,, like i had access to all the major medical journals for 6 years and spent alot of time reading various biologically based studies..

what i learned from all that time was that you simply cannot take a bunch of pieces of research on different things and apply them to something else to make a point, and spurr should have known better in certain cases.. whether he was trying to help others or not is not up for debate..