I hope it will be double yield, don't know what will happen for sure!im doing two a control, under as identical conditions as the test without the pressure but with the same co2 concentration.
If the test plant shows results, Ill start messing with temp tolerances,tolerances for higher nute solution to keep up with the increased photosynthesis? Who knows what I'll find, hope fully good enuff results in yield to justify building a multi-plant chamber.