Quote Originally Posted by btownbuddah
Thanks oldmac,
Those meters are much cheaper than the one I was looking at. The advantage to the other one is that it hooks up to my regulator and maintains the desired level. Sounds like I could probably slow down my leak for now. Still, it would probably be more cost effective to lose the AC instead. Assuming, of course, that the yield would not be effected. I just want to do what's optimal. I understand that they can take more heat with CO2. My question is; which is better? Does more heat speed up photosynthesis and the grow rate? Or do the plants still thrive and yeild the best at 75-80? What temp/CO2 ppm/nute ppm do you use for late flowering?
There was a scientific study done on exactly this. It is very informative on light , co2, and temps.
Here is a thread about it...
http://www.springerlink.com/content/...3/fulltext.pdf
It is a scientific document, so basically, what it says is optimum temps are 77-86f for water uptake, even at different co2 levels. This is a study done on cannabis sativa, do not know if indica would be different.:dance: