Hi all: I'm planning an elevated CO2 experiment. I have a sentinel PPM controller that operates a solenoid valve on a compressed gas tank to maintain CO2 concentrations inside a growth chamber.
However, there are about a dozen grades of CO2 gas that are commercially available (e.g. food grade, industrial grade, medical grade) and nobody seems to report this in their manuscripts. Has anyone out there done this kind of experiment? What grade did you use? Thanks! Gord
