dry ice=co2???

if i were to take a cooler a 4 1/2 inch or 120 mm in line fan some 4 inch duct and some dry ice and but that all together would this make for a sufficient source of co2 to the plants.

i plan to attach the fan to my cabinet from the inside. hook the duct up to the fan by way of flange and run it to the hole in the igloo cooler. there will be about 3 feet of duct. and i am working with a 5 sq ft space in a cabinet.

i do not want to have the dry ice inside the cabinet thats why i chose this way of doing it

will this work or will it cause a temp problem?

has anyone tried dry ice for co2?

the air coming out of the duct will be 30 to 50 degrees is it already hot in there

i have it vented pretty good i have 2 150 watt hps and two of the 4.5 inch fans sucking out heat by way of 4 inch duct i ran out of batteries so my temp gage is not working so im not sure what the temp inside is.

you have 2 150's in a 5 sq ft cab? Why did you decide to do that instead of like one single larger watt hps? I am just getting ready to build a cab and researching every method there is.

If you are brining in fresh air, and exhausting hot air, then you shouldn't need to supplement CO2. CO2 is really only needed in situations where you cannot vent for extended periods of time. Just thought I'd let you know that you can save your money :)

i was going to get a 250 watt hps, but after talking to my local hydro shop guy he said that two 150 watt lights would be better because.

1. two 150 watt lights equal 32,000 lumen and one 250 watt light equals 28,000 lumen...the more lumen the better

2. the plants wont stretch as much towards the light.

and i only do 2 at a time so i have 1 light over each one

this is the light i have
150 Watt HPS FloraLux Grow Light

and this is the cabinet i have
ShopLocal.com - Save time & money. Online and in-store.
i used some black plastic spry paint on the outside and left it white on the inside
and i use two 5 gallon bubble buckets

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Originally Posted by Comatose

If you are brining in fresh air, and exhausting hot air, then you shouldn't need to supplement CO2. CO2 is really only needed in situations where you cannot vent for extended periods of time. Just thought I'd let you know that you can save your money :)

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thanks for the heads up. i thought it would be a nice little extra but im in and out of my cab all day checking p.h. and stuff plus i do have it vented. so i will pass on the co2 then thanks again for the heads up

You get more lumens-per-watt with the larger light, but multiple points of light is a good enough thing to make the 6 lumen-per-watt difference kind of moot, lol!

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Originally Posted by stinkyattic

You get more lumens-per-watt with the larger light, but multiple points of light is a good enough thing to make the 6 lumen-per-watt difference kind of moot, lol!

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stinky,

are you saying 2 150 watts are not as good as 1 250 watt? i'm ripped as hell and i cant figure out if your saying its a good thing or a bad thing.

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Originally Posted by stickyicky07

stinky,

are you saying 2 150 watts are not as good as 1 250 watt? i'm ripped as hell and i cant figure out if your saying its a good thing or a bad thing.

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2 150's are better than 1 250. do the math 2x150 = 300 compared to 250 it obviously is more efficient plus it is easier to cover the area with 2 lights to get equal coverage