CO2 and dark period??

Daithy

Active Member
Hi everyone,

Right, after going thru threads and the net the situation looks like this:

The plants need CO2 in the light period. They transform the CO2 into Oxygen. Conversely, at night (dark period) they use Oxygen and produce CO2. From what I've read the Oxygen levels needed are much smaller than those of CO2.

A lot of people would say that increased amounts of Co2 will increase yield significantly. That part is quite clear. What I am a little perplexed about is:


  • You supplement CO2 in the light period (I'm okay on this one)
  • How do you supply extra Oxygen in the dark period (??) -- no one ever discusses that one
  • If my room set up is that I cool lights only, so ducting goes through the lights only so no air is brought in/out from my tents. Using dehimidifier, and CO2. But what would I use in the dark period for O2????


Thanks everyone.
 

FilthyFletch

Mr I Can Do That For Half
Co2 is for lights on time only. Co2 is heavier then air so you need fans down low to blow it back. Using CO2 you still have to do air exchanges several times a day lights on and off. So you have to have fans bring new air in and old air out. I like my night air exchange all night so fans and dampers open and run all dark time Done right CO2 can add 80 to yeild, cut flower time and make buds swell and be very dense. Keep CO2 ppm around 1500 ppm
 

Daithy

Active Member
Co2 is for lights on time only. Co2 is heavier then air so you need fans down low to blow it back. Using CO2 you still have to do air exchanges several times a day lights on and off. So you have to have fans bring new air in and old air out. I like my night air exchange all night so fans and dampers open and run all dark time Done right CO2 can add 80 to yeild, cut flower time and make buds swell and be very dense. Keep CO2 ppm around 1500 ppm
But if I'll keep my fans on, won't it extract my precious CO2 away? If the CO2 is too heavy, can't oscillating fan(s) move it air in the tent?

P.S. I am not challenging you, only suggesting.
 
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