C02 Calculator ~ Calculate How Long to Run your CO2 Tank

like a light timer has any one got a fan timer that reads air temp and turns on and off at certain temps ??

thanks alot

peace and respect

Toke+Choke said:

has any one got a fan timer that reads air temp and turns on and off at certain temps ??

Click to expand...

Yes...lol...I use one of these.

http://www.controlwizardproducts.com...php?prod=EL500

Cooling thermostat, if you want you could use this with a timer, but you wouldnt need the timer because the fan would only kick in when it gets to a certain temperature, then turn off again when it gets cool enough.

I was wondering if anyone out there is using CO2 in a room that has A/C. If so are you only venting out when the lights are off. I've had mine set up to release co2 every every few hours with the exhaust fans coming on for a few minutes a little before Co2 is released again. This is the first time I've used co2 but I figured some fresh air every couple of hours would be good. thanks

this post might upset a few.... but i have my intake and outake on during the whole light period and use co2 pumped in at 2000, my outake is high and as the Co2 is heavier it works fine leaving my plants with about 1200ppm

i just got a co2 generator/ propane burner its like an lp5/lp10 resembles a gen-2e anyways I was really wondering how to get the co2 that it generates into the grow tent ?

bigwheel said:

Well as a dutiful rookie in this hobby I went and read the FAQ and it said at night Co2 levels climb..guessing cuz all the trees and stuff working in reverse. For an indoor grow why couldnt a person just run the lights at night and draw in some outside air..making it possible to skip the artificial Co2 injection or so it would seem to me. I mean if it need man made Co2 so bad how can it grow wild outside along the river bank without nobody there to inject it? Color me cornfused.

bigwheel

Click to expand...

well not to question ur intelligence or nothin, but in the US, growing mary jane is illegal so to help make ur grow room a little bit more stealth, growers use the lights during the daytime where the temperature are already up so that at night, when the lights heat up the room, the temperature wont show up on some sort of thermal camera or radar that law enforcement may be using to investigate

great info, I added to your rep.

Ok well my plants are about a week from flower (12/12) switch.. Im posting this thread for the reason being that I need to know when to Turn off my fans. I have a 6" vortex bringing fresh air in from the room the tent sits in. Then I have a 8" vortex that pushes air out. If i setup a propane burner outside of tent to make co2 when burning then what fans should i turn off/on at all when this propane burner kicks on?

teranone said:

super,thatnks!

Click to expand...

iroman said:

befor man walked the earth ext... plant ruled the earth co2 was very high in short yes even if you have 1 or 2 plants if you have the money get co2 if you get a tank run it just like bctrippin said 1500ppm turn off at night if no tank some shops sell palls of compost that let out co2,when I started growing the first 4 times I didnt use co2 try number 6 I did with clones from the same batch and got 20% more bud

Click to expand...

Umm have you heard of global warming? CO2 is higher now than ever before in earth's history, due to man's burning of massive amounts of hydrocarbons...if anything, plants are better off now than ever in terms of available CO2 availability

LiquidLumen said:

Umm have you heard of global warming? CO2 is higher now than ever before in earth's history, due to man's burning of massive amounts of hydrocarbons...if anything, plants are better off now than ever in terms of available CO2 availability

Click to expand...

Dude, really? Do you seriously think that co2 levels have never been higher in the last 4.6 billion years? How do you think plants evolved to utilize 1500ppm in the atmosphere? For most of the earths history it has been much hotter and humid than it is now with much more co2 in the atmosphere than exists currently. Except for a period during the carboniferous period, co2 has been above 1000ppm; until about the end of the Cretaceous. It wasn't until Pangea began breaking up in the Jurassic Period that climates changed and Carbon dioxide began to decline from the then at average concentrations of about 1200 ppm to where it is today. The highest concentrations of co2 occurred (that is since the earth began to sustain life) during the Cambrian Period, nearly 7000 ppm!

question...... how long does an average bottle of co2 last you guys? a week?

thanks for that calculator, that thing kicks ass

cud i use my co2 tank from my paintball gun? and if i can what do i get to put on it? and where can i get it?

Now that was easy..... Thanks

I've been lurking for some time now, just gathering info for a friend. I'll use my first post to help save you guys some money.

Wanna see something way cheaper than that control wizard thermostatic fan control?

http://www.amazon.com/gp/product/B000E7BTFO

Hope this helps someone. It's what I would use if I were growing

LiquidLumen said:

Umm have you heard of global warming? CO2 is higher now than ever before in earth's history, due to man's burning of massive amounts of hydrocarbons...if anything, plants are better off now than ever in terms of available CO2 availability

Click to expand...

Please never post again. Your ignorance is dangerous.

This is a post I took from my journal.......should explain a few things.Put a few hours into the grow this weekend. Transplanted the girls into 3 gallon pots. Set up the flower area with 2-400 watt MH lights (I will veg there until I decide what to do). Took the light from the tent and one I had on the shelf and set them up. Now I need to re-do the co2 math/timers. The co2 math tells me 4 minutes at 20CFH to bring the co2 levels to 1500ppm for a room that size. So this is going to be the new schedule....Lights on 8:00am, c02 kicks on at 9:00am-9:04am, again at 10:00am to 10:01 (just 1 minute), again at 11:00am to 11:01am (1 minute).At 11:55am to 11:59am, the fans (exhaust and intake) will kick on full blast and clear out the room of the unknown amount of co2 and bring it back to 300ppm. At 12:00pm the co2 kicks on until 12:04pm then kicks off, and the 3 hour cycle repeats it's self again and again. This should maintain the 1500 ppm of co2 i'm looking for, or close to it.

very informative site
thanks for the link

Can't wait to hear the progress report!