Air quality killing plants? Strange problems please help

[Drunkengrower]

Drunken is it possible to provide CO2 from a bottled source for a while to eliminate the propane burner as a suspect? I am thinking there may be ethylene build up from the burning process. If problems persist with bottled CO2 then at least you know the burner is not at fault!

I just read a university study about ethylene gas. It's 100% of my problem I believe. Turned off the burner to get the plants back and got a fresh air exchange and exhaust hooked up.