Taking into account all environmental conditions and strains are different; all things equal, what is the optimal CO2 Level for 4 plants in 22Qt buckets indoors? I have mine set 1600-2000 ppm. It of course is off at night, and I’ve slightly raised the temp during the day for the increased metabolic activity as well as adjusted thier feeding schedule to reflect the increased nutrient usage. Little by little mind you. I’ve had significant burn in the past.
Back in the day I used 1500-1750 PPM... then the gas guy got greedy I moved on he went bust ...lol C02 adds a further cost to the end bud ..that I found hard to justify as I also grew salads for the local school still it was fun How to Use CO2 to Increase Cannabis Yields! | Grow Weed Easy cheers/