Quote Originally Posted by SyKo
cool thats good to know thanks,i had plans of running co2 at night cuz i dont have to run exhuast as much,but now i wont lol

so are you saying if your above 10,000 lumes with floros you could still benifit from co2? i got 12,000 lumes in a large upright freezer could add 3,000 more mabye

also do you think air coming in from a basment would have enough co2 in it,not
to even bother with adding more?
thanks man ,peace
Ambient air is still around 300 ppm period.

I can't guarantee success with CO² and fluorescents no matter how many lumens they say they put out. I have never tried it so I can only quote the math and science. You don't need to have the expensive equipment to monitor the PPM you can do the math and use a timer. I just like to know and not guess things. I guess that's why I am a control freak with my plants.


Here is a caculator that may help you
http://www.hydroponics.net/learn/co2_calculator.asp