I wanted to do an experiment with Co2 to see how much of it plants actually consume. I realized I didn’t have the equipment to run control tents so I decided to come at it from a different angle. I have the room that my grow tents and Grobo all live in, spare bedroom 12’ x 12’ room. With me home a lot and my gf working from home with the dog running around the entire condo stays at a pretty consistent Co2 level of 1,000-1,100 ppm which is supposed to be “close to perfect” levels for cannabis (please correct me if what I read is wrong, I take no offense). We all need to remember that any animal is a Co2 factory and that includes us.
So for my test I simply put a sensor inside the tent and a sensor outside the tent to see how much of the Co2 is being consumed by the plants. So my plants are in week 3 of flower so I figured this was a good time to pull off this test. I did the test for only a few days but the results were consistent each day. This is not a perfect test but I think you will find the results interesting. So what do you think happened?
The outside sensor read a consistent Co2 level between 994 and 1,044 ppm the entire 3 days of the test. My sensor tracks the highs and lows each day so this was easy to determine. The sensor on the inside of the tent on the other hand was not as consistent. During the day the levels would range from 430 to 685 ppm. This means the plants are consuming a pretty constant supply of about 500 ppm or 50% of the Co2 in the tent. I find this intriguing and I also had another interesting find. I read that plants don’t consume Co2 at night but while at night the Co2 levels did rise to almost 900 ppm showing an obvious consumption drop off but it never came up to the outside sensor reading. This showed me that the comments that plants don’t consume Co2 at night to be potentially debunked but more real science needs to be done.
I realize this is rough science but I did move the sensor in the tent all around to find the most consistent reading and it ended up being tied to the scrog in the middle of the tent right at the base of the flowers. This was a fun little experiment and I want to boost the Co2 level in the tent so I will be playing around to see the effectiveness of Exhale Bags and other Co2 supplements. Grow on my friends!