Now that I've had some experience with C02, I'm starting to wonder about some of the information thrown around in this thread. Can anyone direct me to some real evidence, scientific or otherwise, that actually backs up the proposition that the higher temperature range (85-90) is actually more beneficial that say the low 80s? Is this just urban myth? Completely anecdotal?? I'm currently running in the low 80s with incredible results using the CHHC-1 and the Hydroinnovations C02 generator. I use ac and light ventilation to keep the temps down. I've mounted the generator outside the room to further reduce heat.
Some people are suggesting higher humidity levels are beneficial as well as higher temps with C02. In my experience when humidity levels climb above 80, it starts to interfere with the plants respiration. If the air is saturated with water vapor, then plants can't as effectively transpire. It becomes difficult to for atmospheric byproducts to move through the stomata if the air is over saturated with water. Plant exhaust then becomes stifled and growth slows...any thoughts? I'm constantly fighting to bring humidity down in my sealed up room. Currently, I'm working on a 3 hour cycle with 15 minutes of fresh air exhaust every 3 hours and ac and a dehumidifier working constantly. The plants look fantastic!
Definitely use the C02 during veg! It really accelerates growth rate and can significantly shortens veg time.