So plants dont need ANY co2 at night?

G

glann

Well-Known Member

• Feb 16, 2014

• #1

My ambient co2 is like 170, I live way out in the sticks, outside PPM according to my meter is 170-200 PPM.

I just wanted to confirm co2 levels dont matter during lights off.

Thanks-

 

C

CaretakerDad

Well-Known Member

• Feb 16, 2014

• #2

Your ambient CO2 levels are more likely 380-400 PPM depending on your altitude and proximity to population centers. Methinks you need a new meter.

 

G

glann

Well-Known Member

• Feb 16, 2014

• #3

I have two meters, they read within 10% of eachother

 

C

CaretakerDad

Well-Known Member

• Feb 16, 2014

• #4

glann said:

I have two meters, they read within 10% of eachother

Click to expand...

Then you are living on another planet, 170 PPM for CO2 is not a condition that occurs naturally on earth.

 

cat of curiosity

Well-Known Member

• Feb 16, 2014

• #5

To answer your question, lights off, no photosynthesis, CO2 is irrelevant (excluding extreme possibilities). IOW, you don't waste pumping CO2 during dark cycle.

 

Ou8aCracker2

Well-Known Member

• Feb 16, 2014

• #6

Plants spit out any unused co2 at night,no need to supplement at night.

Really no need to supplement wuth co2 either unless all other environmental factors are dialed (lighting,temperature,humidity,water,nute strength,etc.) as the other environmental variables are more important.

Of course if you are running a sealed room,co2 must be used,but not at night.

 

G

glann

Well-Known Member

• Feb 16, 2014

• #7

Thank you for the confirmation. As for arguing my meters readings, I'm sure they could be off by 80 ppm. Either way its what the digital readout says. No need to get uptight about it 'dad'

Again, ty for the confirmation.