I would just say you have to experiment. That's what I always say about questions of this nature.
I have no idea about what kinddiesel is doing, with such a high ppm of co2. That is so far past anything I've done, it's like it's from another planet, with another type of plant.
I achieved my best yield with one strain at only 850ppm. (set point. I never graphed out the actual level. Obviously, every time the burner comes on, it over shoots the set point before it turns off. So your average will always be higher than the set point.) Higher than 850 brought out a few deficiencies that I could never eliminate, and made the burner run exponentially more, with no increase in yield.
Next strain, noticeable difference between 850 and 1300 or so. So now it's at 1300. Over 1300 doesn't seem to do anything else for growth. (again, that's the set point. I don't know what the average actually is, i'd have to graph that out.) I push my plants about as hard as I can while keeping them as healthy as I can, there is always a compromise. DWC, hiblow septic aeration diaphragm pump, 60 gal tubs, aeration tubing, reflector walls, fans from above, natural gas liquid cooled co2 burner.
I also have Not found that the temp needs to be in the 80s or above to get the explosive growth. I try not to let the temp get too much into the 80s, because I have observed a noticeable reduction in bud density and quality. According to my research, I am not alone with those observations, but I don't take it as far as some people. One guy commented that he doubled his ac cost to keep his room at 70 F, spending as much on AC as on running his lights, just for that reason. I am more about quality than quantity, but energy efficiency is of paramount importance to me, hence the liquid cooled burner, etc, so to me, that's too much.
