Stupid Fan Control Question

[rebourne]

I was curious if stopping the fans (intake and exhaust) during either the light or dark phase of photosynthesis would be beneficial to allow a higher concentration of CO2 (using something similar to: https://www.rollitup.org/general-marijuana-growing/258474-home-made-co2-guide.html). Thanks.

 

[elduece]

Plant don't use CO2 at night. Only during photosynthesis.

 

[elduece]

You can add another timer and plug your fans/ventilation to it via surge protector for during daytime hours. And have the timer periodically shut off the fans.

 

[rebourne]

Thanks for the replies! Do you think shutting off the fans for a period of time would be beneficial? Any cons with doing this?

 

[Psychedelic Breakfast]

Thanks for the replies! Do you think shutting off the fans for a period of time would be beneficial? Any cons with doing this?

Hey rebourne,

Personally I keep my fans going at all times. Plants don't do photosynthesis but they still go through respiration at night which uses up oxygen. So giving a steady source of fresh air at all times is great. Plus it'll lower the chances of mold and keep the stems tougher.

The only benefits I can see is a lower electricity cost, but I could be missing something.

Hope that helps

 

[potpimp]

Fans will pull out the CO2 very quickly. If you are using CO2 you can run higher temps without harming the plants.

 

[rebourne]

Fans will pull out the CO2 very quickly.

Hi PotPimp! I was considering adding additional CO2 and I was thinking that the fans would disrupt this, which is why I was considering shutting them off for a period of time to allow more CO2 to be used. Ideas?

 

[potpimp]

My only idea is to not use the fans when you've got CO2 in there.