CO2 questions!!!

[Robhpx13]

ive always used sugar and yeast but have advanced through the stone age of growing and bought a brand new CO2 tank and solenoid/regulator....how long should I keep a 20lb alumminum tank on in a (2 1/2x6x9ft )room to acheive proper ppm????

 

[Guest]

heres a calculator that should figure it out for you. just set you CFH to the right setting, and run it for the correct amount of time.

http://www.hydroponics.net/learn/co2_calculator.asp

 

[Robhpx13]

how much do you know you let out by cubic ft.... is it the other knob on the regulator with single #'s..............thanks a bunch that helps a ton by the way!!

 

[Guest]

yeah theres two meters. one is PSI which tells you how much CO2 is in the bottle. the other is the CFH which tells you how fast it's being released. heres a link to a picture of the device. the CFH is the meter on the left. hope this helps

http://www.hydroponics.net/i/images.asp?i=241153

 

[Robhpx13]

that site is wonderful for anybody, quick math....I figured out it would take about 140 days before I need more co2 in the bottle as well. I read in ed rosenthals book that its better to spread co2 out with the tank through shorter periods of time. how do you do that lower the ppm?