Right. This was my understanding as well. I was “hoping” by piercing the air tubing and running it in the canopy, it would give the stomata a much higher chance of opening and grabbing the co2. My exhaust and intake get turned down to their minimum. And circulating fans get shut off or pointed away to keep the ballasts cool. Digital ballasts like to shut off if they get too warm.Co2 will benefit if you can keep it in there. Exhausting will pull it out but shutting that off will require a way to control humidity.
Probably the best way to tell is using a co2 monitor to test and verify the ppm at different stages of the day with and without.
my main concern is the ppm levels. If they’re too high I’m just stressing the plants and could be why my sherbets went hermie. Too low and I’m wasting my money and time. Here’s the catch. Those damn co2 meters are bloody expensive! I wish I could just rent one for the day.