using dry ice 4 co2

[lakers24]

Has anyone used this lately?If so how much is a good amount?

[Binzhoubum]

Thanks for the link, but it doesnt say anything about how expensive it is or whether you can store it for a long period of time... It also has no information concerning growing... so thanks but not really looking to do a book report on dry ice hardon.

Actually, that link did have information about storage and applications to plant growth...

:smokin:

[BOYZNUS]

AS WITH ANY CO2 ENRICHMENT,, USE IT DURING LIGHTS ON, NOT DARK PERIOD.

I NOTICE BIG DIFFERENCES WHEN I USE CO2 GAS. I CAN TELL WHEN MY TANK RUNS OUT. THEM GIRLS LOVE THE GAS!!!

GOOD LUCK

[Dazed4now]

i use dry ice enrichment and it works great
every night i break a chunk off a 5lb brick of dry ice and let it set on the soil and turn all my fans off and just let it sink in.
i reccomend you have a ventilated light fixture so that the stale c02 can be pulled out of the room cause if you have your fans all it just blows it all away and doesnt give it time to set into the plant or anything

[Jdog7000]

Can someone please give a clear answer on how much to use ??????

[1Onelove]

Im using dry ice currently as we speak i just changed it from the cooler to a bag with a couple holes and its hanging from my top its right in between the plants,i figured they would get more c02 if it was elevated since the c02 seems to stay low when its evaportating, i bought 7lbs for 1.39 at albertsons and its still going from early this morning...im didnt know why they wouldnt want c02 at night??

[mafia819]

There's no co2 absorbtion at night because when it's dark, there's no photosynthesis going on so no need for co2...

Photosynthesis occur only when the plant receive light and convert co2 into o2.

Good Day! :thumbsup:

[jakester]

...and also DAzed4now, placing it on your soil is not optimal. Your roots want oxygen, not CO2. Put it in a dish near the plants. Sounds like you are just throwing your dry ice away.

[drudown11]

ive read somewhere that the c02 doesnt work as well into flowering can anyone clear that up?

[oddish]

Okay, this may sound a little weird and a little off topic, but may still be related. Has anyone ever tried burning candles for CO2? In a combustion reaction, CO2 is produced like the following example:

CH4 + 2O2 → CO2 + 2H2O

As you can see, oxygen is consumed in this reaction. But during photosynthesis, the plants only need light (photons), water, and CO2 like the following reaction:

2n CO2 + 2n H2O + photons → 2(CH2O)n + 2n O2

So ideally, you wouldn't be losing Oxygen, since the plant will produce as it as a byproduct. I just don't know if the Oxygen the plant produces will be sufficient to nourish the roots during the dark cycles. Does anyone know what this reaction or cycle is called? I can't look it up if i don't know what its called .

So I was thinking if this method would be more practical than dried ice, or even better, to be used in conjugation with the dried CO2.

Here are some problems/concerns that may come up:

1. the grow box/room might get too hot.
2. It might burn down my place....
3. the candle burning may not produce pure CO2. The combustion reaction may produce other gasses produced like Nitrogen (which probably isn't so bad, but still might be an influencing factor on something)
4. Theoretically, the amount of oxygen in the space will be halved since it takes two moles of O2 to produce one mole of CO2. I don't know what the effect of this will be

So I was thinking, blow out the candles during the dark cycle, light it back up during photosynthesis (alot of work, but still better than waking up early in the day and buying dried ice)

Im not a very experienced grower by the way. I'm just trying to think of ways to skip/minimize the ventilation step so that my grow box is a little more discreet/stealth for my next grow. I want to try this method, but I also don't want to buy dried ice every day. My gf didn't approve of me growing so she indirectly made me choose between her or the plants - which i think was bullshit. I thought to myself whats better ganja or tang? I chose the later since tang doesn't grow on the ground and I figured I could eventually have both. But dammit it was so hard to kill my two babies that I cared for almost 2 months...anyways that was a little off topic, but I wanted to share my ideas....

Thanks guys, sorry for the long post ...