Time Limited CO2 Support?

Burning cats 18 hour a days to produce CO2 did'nt look a good idea for me 😿😿🙀🙀

extra co2 'can' be useful. When it is elevated, you need to give it more light than when it is not elevated to take advantage of it. VPD is based on leaf temp, not tent temp. If your circulation is sufficient, the RH should be fairly consistent throughout tent, but if not the RH at the leaf too. Could go to 50DLI and then some trial and error from there based on what you see. Just beware that if you are slightyl off it may take 2 weeks ore more for light damage or minor effects of too much light to be visible. Controlling VPD as you do will make more effective use of the excess co2, assuming it's where it should be -- i find lots of deviation in suggestions when searching. Everything thinks what they do is best and never compare it to anything else, so how would they know? if it stays a consistent 1100ppm when whatever you are burning burns, that's all that matters -- it is present at elevated levels and around the leaves as such. I wouldn't try to seal anything up for this particular context because you might kill yourself doing so. Something most be lost in transaltion because "cats that burn" doesn't make sense. Those may produce more co2 than what is safe in a sealed space. Also, better get a co2 meter with an alarm if it goes too high.

I used CO2 for years and it certainly has its benefits. One day I weighed the amount of effort put in to run CO2 versus what I got out of it. Nonetheless all my talks are in the corner collecting dust along with the controllers. I couldn’t agree more with @m0use below. You have to have everything dialed in for you to benefit. At one point I had DWC buckets drinking 2 gallons a day each. You neglect it for even a minute and that massive growth can be a quick death too.

Would recommend you to go a bit lower with your vpd, in veg room VPD should be between 0.8-1.0kPa or even lower. With CO2 you have higher benefits with high temperatures at/above 28C. I believe it peaks around 34C and +80%rh somewhere, but ther’re chances running into trouble maxing this out, mold sprores do also likes these conditions. CO2 intake also rises with the numbers of leafs you have on your plants since its absorbed by the stomatas on the underside of the leafs, so you will notice a greater boost later on when plants are a bit bigger.

Unless your grow room is sealed running CO2 is wasted as its just vented out. Its only beneficial if you have hit the ceiling of all other points in the grow. After hitting the maximum DLI and growth adding c02 allows the plants to take in more DLI and nutrients and tolerate more heat. but its a tricky game. I am not a fan of c02, just use the sun and grow more plants.