Co2 and dry ice

this might be a dumb question but i keep hearing things about dry ice and how it gives off tons of co2 can anyone shed some light?

Dry Ice is frozen CO2.

It melts.

Can I use dry ice to provide CO2 for my plants?
You can do this, but it is extremely difficult to regulate the sublimation of CO2 in an easy way. The cost of replacing the co2 every few days will rapidly mount up as it does disappear quickly once outside a freezer, and pretty quickly even inside a freezer.

Plus too much CO2 will kill your plants. It's hard to control the sublimation rate of dry ice, so you have no way of regulating the atmospheric content.

In short - don’t bother! If you really want co2 enrichment then buy a bottle and a regulator.

i also like widows idea of a natural gas pilot light in the grow room. this lets off co2 as well, if you have accesss to natural gas that is.

While it is hard to regulate, I did place a 50lb block of dry ice into my grow closet, which at the time was 2'x3' with ten plants in there, and for two days it showered my babies with co2, of course at lights out, I placed the dryice in a cooler for safe keeping. I would do it again too.
Of course the problem with dryice is price, if you buy it retail they will try to rip you off to the tune of $75.00 but at wholesale the price is about $15.00 for a 50 lb block. As a general rule, dry ice will sublimate at a rate of five to ten pounds every 24 hours in a typical ice chest.

you could setup up a auto drip of vinigar into baking soda, cheap and will do the same thing.

[quhote=mogie;33511]Can I use dry ice to provide CO2 for my plants?
You can do this, but it is extremely difficult to regulate the sublimation of CO2 in an easy way. The cost of replacing the co2 every few days will rapidly mount up as it does disappear quickly once outside a freezer, and pretty quickly even inside a freezer.

Plus too much CO2 will kill your plants. It's hard to control the sublimation rate of dry ice, so you have no way of regulating the atmospheric content.

In short - don’t bother! If you really want co2 enrichment then buy a bottle and a regulator.[/quote]


So what would you say is too much co2 saturation (with optimal air circulation) 50%-75% naturally i still have my intake fresh air on a thermostat. but i run a bottle and i am getting a co2 meter in 2 soon.

i heavily saturate for 30 min at a time 4 time a day during light exhaust off sealed 12x12x8 room.

is it possible for my large garden to to be over saturated??

Yes, you can use too much CO2. You should calculate how much to use to reach your desired concentration.

Most growers enrich to 1500ppm, so to figure for that amount, take the cubic feet of your area ( L x W x H ) and multiply by .0015, to get the volume of gas required. Now multiply that by the flow rate that you set your meter.

For your room 12x12x8 is 1152 cubic feet, you would need 1.73 cubic feet of CO2 to reach 1500ppm. If your flow rate is 50 cu ft/hour you need to leave it open for 124 seconds/hour. If your flow rate is 10 cu ft/hour you will release for 10 minutes.

HTH

heh, i wonder if you could suffocate your self with a co2 tank?

i make homebrew beer and was wonderin if the gas escaping my fementers airlock (co2 i think) will help or harm my plants

le1337need said:

heh, i wonder if you could suffocate your self with a co2 tank?

Click to expand...

uhh yeah there's a warning label on the tank.

so just to say to potroast thank ou sooooooo much ure da man!!!!!


I HAVE MY REGULATOR SET AT 6 (ITS ONE OF THOSE FLOATING BALLS FOR 15 MIN PER HOUR SO I AM CLOSE)


AGAIN THANK YOU ROAST