co2 during flowering

Here is my 2c from my little experience with dry ice thanks to Videoman's advice by placing dryice in a styrofoam box to control evaporation. After calculatios and some trial and error I have been able to maintain CO2 ppm levels above 1000ppm for over 8 hours with just 4 oz of dry ice placed in a small styrofoam box with a small hole in it. My grow room is 4x3x6. The main problem initally was that humidty shot up over 80% when the room was completely sealed. So i had to think of how to vent out the humidty without depleting all the CO2. I have made caps for my air in and outlets so that less air is exchanged and I am running my 12V fans on 3V in addition to that I had to quadruple the amount of dry ice from initially 1oz to 4oz. I was really surprised to see how steady the Co2 levels remain. By the way I store the the dry ice in another styrofoam box in the freezer and then take 4 oz chunks twice a day. I do wonder if it is really worth it thou...
Peace

Videoman, why do think Co2 is only usefull for budding? I think it should be helpful throughout all stages? That is if everything is in excess as I understand it.

Cheers

LMAO @ recvryjst 42

LMAO @ recvryjst42

I never said that, you misunderstood me. Using it during vegging can shave a week off of veg time, and this IS helpful.
Using it during flowering will increase your yeild substantially.
I did not say its "only" useful during flowering, but it is "more" useful during flowering.
Peace

LeFreak said:

Videoman, why do think Co2 is only usefull for budding? I think it should be helpful throughout all stages? That is if everything is in excess as I understand it.

Cheers

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videoman said:

I never said that, you misunderstood me. Using it during vegging can shave a week off of veg time, and this IS helpful.
Using it during flowering will increase your yeild substantially.
I did not say its "only" useful during flowering, but it is "more" useful during flowering.
Peace

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My bad. I must have been stoned. lol. Thanks. so good throughout.

cheers

LeFrank, you do not put dry ice in your freezer. Like videoman says, dry ice is very dangerous.

wafflehouselover said:

LeFrank, you do not put dry ice in your freezer. Like videoman says, dry ice is very dangerous.

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I don't see what's wrong with that? It's only dangerous if inhaled above 2000ppm. Or did I miss something?

it can damage your freezer, dry ice is colder then your fridge so it will turn off the thing that makes your freezer cold. Plus with enough dry ice in there evaporating and when enough pressure builds up your freezer can blow open.

Well I suppose if you placed a several pounds of dry ice and left the door closed for a day or two it could blow up or at least blow the door open. I am opening the freezer door at least twice a day and I only have a pound of dry ice in there at most which takes 4 days to melt in the styrofoam container. The temperature in the freezer is fine the styrofoam insulation seems to be suffieicnt. If anything else it will remain cooler in there and use less electricity. I can imagine that could be a problem if placed directly in the freezer without further insulation.

What da ya think? Should be fine, no?

Cheers mate

Ill buy Dry ice as soon as possible. tanks are costly.. and half a pound should be great for my little closet! cool these girls up.

been wondering for a while hoe to cool the room while giving co2. and i think both techniques would work. whatever works you know

where do you get dry ice from? ive heard of it for years but dont know how people got it

Videoman..Thanxs bro. I have heard more growers use Co2 than dry ice for sure.
but I have read other side by side comparisons with the better dry ice results like yourself & lefreak.

I work with gass also.. im convinced to use dry ice now. I would bet that 50% of the tanks that folks get new or refiled have not ben filled poperly due to lack of person filling the tank.
how would u know if the tank was purged 3 times properly before filling with liquid (this is the proper way & its never practiced) hence air in the tank.
I would bet those using tanks have to c sum fluxuations...

hulio..I found a local 7 11 that had dry ice outside in a chest just like the cub ice..ur local ice co. sells it.

you'll be just fine.

LeFreak said:

Well I suppose if you placed a several pounds of dry ice and left the door closed for a day or two it could blow up or at least blow the door open. I am opening the freezer door at least twice a day and I only have a pound of dry ice in there at most which takes 4 days to melt in the styrofoam container. The temperature in the freezer is fine the styrofoam insulation seems to be suffieicnt. If anything else it will remain cooler in there and use less electricity. I can imagine that could be a problem if placed directly in the freezer without further insulation.

What da ya think? Should be fine, no?

Cheers mate

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Thanks for the assurance. better be safe than sorry....

Hey dude, try Dry Ice Directory - Where to buy Dry Ice for a listing of companies near you that carry dryice.
Peace

hulio said:

where do you get dry ice from? ive heard of it for years but dont know how people got it

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video,so you can store dry ice in an operateing freezer.as long as it is in an insulated container such as styrofoam.i was googling all day and ended up confused.i have a buddy that can get a decent price on dry ice but i have to buy 18 kg.and they will store it in a walk in freezer,is that safe.and then i bring it home,to put in my freezer.how long should 18kg stay frozen for,if i put it in a container with a small hole for it to release itself.

I've actually done in a few ways, when I use to own a cold storage facility, we use to store dry ice in one of the freezers, all the time.

I am in an industry where alot of poeple use these fiberglass, insulated dryice operated freezers also. These fiberglass freezers are used to transport perishible goods. It's sort of like a huge coffin.
In these fiberglass freezers, it'll last about one week for a 50 lb block.
The same holds true in my grow room, if I use the cooler method to hold my dryice. Cubes would melt faster.

Point being is that the lower the temp where its being stored, the longer it'll last. If you are talking about storing dryice in a small freezer, like the one on top of your refrigerator, the co2 may just fill the freezer, and when that happens, it'll open the door on you, to release some of the builtup co2.

I have no idea where you are, but here in the states, dryice is made in 50lb blocks, or in cubes, I always have dealt with the 50 lb blocks. I pay about $14.00 for a 50 lb block, for reference purposes.
Peace

trapper said:

video,so you can store dry ice in an operateing freezer.as long as it is in an insulated container such as styrofoam.i was googling all day and ended up confused.i have a buddy that can get a decent price on dry ice but i have to buy 18 kg.and they will store it in a walk in freezer,is that safe.and then i bring it home,to put in my freezer.how long should 18kg stay frozen for,if i put it in a container with a small hole for it to release itself.

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thanks vid.