General Marijuana Growing How low of co2 ppm during night periods can plants handle?
in the The Grow Room
forums; I am wondering does there need to be a certain amount of co2 in the air while the plants are ...
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How low of co2 ppm during night periods can plants handle?
I am wondering does there need to be a certain amount of co2 in the air while the plants are in the dark periods since they don't use any? does the air need to be exchanged if i have a dehumidifier?
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