CO2 bags in grow tent - Up or down?

[HigherTheHigh]

Just bought 2 co2 bags for my grow tent as im running 3 600w hps lights in cool shades/tube.

Temps are hitting 30c which is apparently good while using co2 bags, question is do i put them up a height or on the floor?

I have fitted them up high level with my lights is that the correct way?

If anyone has used these before can you tell me if it helped with yield and by roughly how much?

The reason i ask is if it not going to do much difference ill turn a light of and then it will go back to 24-25c.

Thanks!

 

[Nicholas Flamel]

Used one before and could not tell any difference in yield but above the plants is where you want to hang the co2 bag. As i understand co2 is heavy and will fall down onto the plants.

 

[KingJoe83]

Above is correct foot above with fan blowing. I'm not sure it really does anything though

 

[HigherTheHigh]

Well im hoping it will help out in the room and not cause any problems, i dont think im going to be able to compare though as i usually only run 2 lights but now im running 3, be nice to get a few more oz out.

 

[Scientific]

If you really want to run CO2, consider going to a gas supplier and buying a 20 pound tank, a regulator, and a metering valve. Here's a link to a setup for aquariums, but it's a similar concept for a tent.

Metering Valve

 

[Why Doe]

Everyone I've ever heard that used co2 bags say they didn't work. There's even YouTube videos of testing with a tester that shows no difference. If your only growin a couple plants then simply your breath is enough co2 it's not until 10-20+ plants that you need to get a co2 bottle.

 

[WoundedKnee]

My mate who has been growing for eons (he has every conceivable little tip and trick going on - he replicates moon light, down to the very cycles of the moon !!) uses a CO2 bottle and regulator. He typically grows about 15 - 20 plants at once. He reckons it makes a tiny difference, but nothing massive. His view is that the sum of many small things makes a big thing !

 

[Scientific]

Everyone I've ever heard that used co2 bags say they didn't work. There's even YouTube videos of testing with a tester that shows no difference. If your only growin a couple plants then simply your breath is enough co2 it's not until 10-20+ plants that you need to get a co2 bottle.

Hmmm... not quite right on "your breath is enough" unless maybe you're living in your tent.

 

[Why Doe]

Hmmm... not quite right on "your breath is enough" unless maybe you're living in your tent.

I live in my house where my tent sucks in air from. So yes I would say my breath is enough lol

 

[WoundedKnee]

I was reading about the CO2 ppm in an ordinary house is about 300 ppm higher than the ambient outside levels.

 

[Scientific]

I live in my house where my tent sucks in air from. So yes I would say my breath is enough lol

OK, your tent is sucking in CO2 that you breathe out, but that's not going to raise the number of PPM of CO2 in the tent significantly--not enough to increase growth.

 

[Scientific]

I live in my house where my tent sucks in air from. So yes I would say my breath is enough lol

That number is going to be so wildly variable depending on size, circulation, number of people, etc, and to be of questionable usefulness.

 

[Why Doe]

I was watching one of liquid jade videos, he had a co2 ppm meter or whatever they are called. During the 30min long video he was taking about different stuff and the co2 increased by hundreds. Now keep in mind this is just one person in a decent size grow room in the span of 30 minuets. So you can imagine more then one person over the span of a day. That's why it's recommended you spend lots of time with your plants, simply you breathing on them helps. I don't think these co2 bags work, and they defiantly don't work if you have ventilation, any minuscule amount of co2 that it makes is being sucked right out.

 

[WoundedKnee]

There is a sweet spot for CO2, too much is as bad as too little.

 

[Scientific]

they defiantly don't work if you have ventilation, any minuscule amount of co2 that it makes is being sucked right out.

Same of course applies to human-generated CO2.

 

[Scientific]

There is a sweet spot for CO2, too much is as bad as too little.

No argument in principle, but too much is unlikely unless you're feeding it from a tank.

 

[Why Doe]

That's why I said for small grows you don't need a co2 adders. I'm living proof, I know you've seen my grows scientific lol.

 

[Why Doe]

Same of course applies to human-generated CO2.

I don't think so lol, your missing the point. Human co2 would go in and out because it's in the entire room even the entire house, we are a constant supplier. As for the co2 bags, it just gets sucked right out. That is if they even produce anything, from all the rest that I've seen ran, they don't.

 

[Scientific]

I'm living proof, I know you've seen my grows scientific lol.

And what have you seen exactly? Before/After? A/B? With/without? Not following your argument.

 

[Why Doe]

And what have you seen exactly? Before/After? A/B? With/without? Not following your argument.

I don't use co2 and I'm breaking yield records over here with this small strain. Pretty sure that wouldn't happen if I needed co2. There are many other things more important then co2 clearly. Co2 is kind of one of those things you add when you've perfected everything else.