Co2 / Dry Ice?

I know Co2 is great for the plants. I read that dry ice evaporating in your grow space puts Co2 in the air. I am gonna attempt this during my grow, it is my first by the way. My question is:

*Should I leave the dry ice to evaporate with my fans on during the day, or during the morning before i turn the lights or fans on, or just during the day with fans and light on? (I run 1000 watt HPS)???????

anyone who uses or has used this technique I would enjoy hearing how you went about it and how it resulted for you. Thanks a lot!!!

Anyone... Someone has had to of done this or know something about it.

I'm curious about this as well

Just run it with the fan on it will help circulate the c02 around your growspace. I had my plants on a table above a cooler filled with dry ice so it would evaporate and rise up to the plants. There is a bonus too becuase if your are growing a purple strin with enough dry ice you can make it cold enough to make a solid color change

Thanks for the advice, it is much appreciated. If you don't mind me asking were you hydro or soil? I am using soil... how often did you do the dry ice?

i use my dry ice at night. that's when the most development is going on so thats when i get it going.

i read you don't want to do it with your fans on, but i would think you would. I always have a fan on, even when the lights are not on.

i turn it down to low.. plus i have 5 pounds of dry ice going at a time so the fan on low is really no issue. it dissipates but you can see it getting blown into the plants to its cool.

My last grow was DWC so hydro but the idea is the same. I would say the way you have it set up is right, the only thing i can think is that if your grow space isnt sealed. but i know it did wonders for me in my grow so i hope it does the same for you.

I read that if you put dry ice in a small cooler and run a hose out the top and have the other end by your plant it will direct the Co2 to where you need it. Make sure your cooler is sealed good.

juicemc22 said:

I know Co2 is great for the plants. I read that dry ice evaporating in your grow space puts Co2 in the air. I am gonna attempt this during my grow, it is my first by the way. My question is:

*Should I leave the dry ice to evaporate with my fans on during the day, or during the morning before i turn the lights or fans on, or just during the day with fans and light on? (I run 1000 watt HPS)???????

anyone who uses or has used this technique I would enjoy hearing how you went about it and how it resulted for you. Thanks a lot!!!

Click to expand...

Dry ice can get really expensive. It takes pounds of dry ice to produce 1,600 ppm of CO2.

dam i wanna try this

thanks great post

Do u mean u use it when the lights are off? Because I've read and heard something totally different. I bought a Co2 regulator(havn't set it up yet) and even it said to raise co2 levels only when lights are on, otherwise its a waste. Anyone else know what is correct? I plan on using my co2 soon.

Jordy Villain said:

i use my dry ice at night. that's when the most development is going on so thats when i get it going.

Click to expand...

dmshizzle said:

Just run it with the fan on it will help circulate the c02 around your growspace. I had my plants on a table above a cooler filled with dry ice so it would evaporate and rise up to the plants. There is a bonus too becuase if your are growing a purple strin with enough dry ice you can make it cold enough to make a solid color change

Click to expand...

lol ter der der, co2 is denser than air. it sinks not rises. just a heads up.google it if you dont believe me.

with lights on... and its prefered and recomended to turn fan off because it circulates the air in the room "venting it" in a way so that the co2 isnt in there as long as it could be for the plants to grasp it. i did a butt load of research for this so ya. if you hang panty hose above your plants and put it in the panty hose it'll drop down right over your plants.... but hey if you dont believe me you can always look it up ... hoped i helped and good luck man.

Yes. Lights on for co2. co2 is used during photosynthesis...no lights...no photosynthesis.

If you're using dry ice to make co2 it'd prolly be better to have the fans on...being heavier than air you're just going to end up dumping it in one spot.

From the botanists:

DRY ICE METROD OF CO2 ENRICHMENT:

This method works well for small areas, especially if some cooling effect is desired. Dry ice, solid carbon dioxide, is very cold about 109 degrees F below zero so we suggest you handle it with gloves. Dry ice is available through freezer and meat packing outlets and is relatively inexpensive. In our std. 8' X 8' X 8' room, you would need about 0.8 lbs. of dry ice per day to raise the atmospheric CO2 content to 1300 parts per million. If the growing area is quite warm, 0.8 lbs. can melt much faster than 18 hours. Two methods can be used to regulate this. One is to cut just small pieces, about .1 lb., and add a new piece every two hours to the growing area. The second method is to put the required amount in an insulated styrofoam box with a few small holes cut in it. This will slow the rate of melting considerably but must be "tuned in" to get it just right so 0.8 lbs. melts in the 18 hours of light "on" time. Extra dry ice must be kept in a freezer to prevent loss due to evaporation.

Since CO2 is heavier than air, one good method of distributing it to the plants is to attach the container or dry ice to the light reflectors which are normally placed over the plants. The CO2 will then flow down through or over the lights and evenly bathe the plants. If a circulation fan is used, the dry ice or its container should be placed directly in front or behind it for even distribution. Common to all CO2 enrichment methods, try to seal up the room or greenhouse as best you can, especially around the bottoms of doors and walls.

The dry-ice method will cost around 60 cents per day for our standard sized, 512 cu. ft. grow room. A possible benefit of using dry ice is the cooling effect it produces.

I'm a firm believer in co2

Sorry for the quality of my phone cam...but this is the difference 4 days after introducing co2 to my op:





Dunno if that's normal growth...but I'll give credit to the tank!!

DAMN, I need to get some ice

Jordy Villain said:

i use my dry ice at night. that's when the most development is going on so thats when i get it going.

Click to expand...

I have always used the yeast and sugar co2 production setup,(I have 8 2liter botttles linked with fish tank hose) recently i thought about using dry ice... but i do know that it NEEDS the co2 during the day. photosynthesis occurs with light co2 and water...and ....supervit. lol... but seriously man...fresh air at night.... co2 filled air during the day...also... Co2 acctually helps a plant cope with higher temperatures... so i would run the fan like everyother day or somthin...and definatly at night and after foiler watererings.

slump said:

Yes. Lights on for co2. co2 is used during photosynthesis...no lights...no photosynthesis.

If you're using dry ice to make co2 it'd prolly be better to have the fans on...being heavier than air you're just going to end up dumping it in one spot.

From the botanists:

DRY ICE METROD OF CO2 ENRICHMENT:

This method works well for small areas, especially if some cooling effect is desired. Dry ice, solid carbon dioxide, is very cold about 109 degrees F below zero so we suggest you handle it with gloves. Dry ice is available through freezer and meat packing outlets and is relatively inexpensive. In our std. 8' X 8' X 8' room, you would need about 0.8 lbs. of dry ice per day to raise the atmospheric CO2 content to 1300 parts per million. If the growing area is quite warm, 0.8 lbs. can melt much faster than 18 hours. Two methods can be used to regulate this. One is to cut just small pieces, about .1 lb., and add a new piece every two hours to the growing area. The second method is to put the required amount in an insulated styrofoam box with a few small holes cut in it. This will slow the rate of melting considerably but must be "tuned in" to get it just right so 0.8 lbs. melts in the 18 hours of light "on" time. Extra dry ice must be kept in a freezer to prevent loss due to evaporation.

Since CO2 is heavier than air, one good method of distributing it to the plants is to attach the container or dry ice to the light reflectors which are normally placed over the plants. The CO2 will then flow down through or over the lights and evenly bathe the plants. If a circulation fan is used, the dry ice or its container should be placed directly in front or behind it for even distribution. Common to all CO2 enrichment methods, try to seal up the room or greenhouse as best you can, especially around the bottoms of doors and walls.

The dry-ice method will cost around 60 cents per day for our standard sized, 512 cu. ft. grow room. A possible benefit of using dry ice is the cooling effect it produces.

I'm a firm believer in co2

Sorry for the quality of my phone cam...but this is the difference 4 days after introducing co2 to my op:

Dunno if that's normal growth...but I'll give credit to the tank!!

Click to expand...

fucking A brother! what a sweet set up! how many BTU's is your AC and is it a dual hose model? how are you administering the co2? do you recommend using co2 in veg, because iv heard before is only useful in flower...what type of lights are you running and what are your average temps? i have a similar set up to you...got the AC and a co2 gen. i run in dirt though...