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I have a sealed room with a CO2 burner holding the co2 at 1200ppm do i have to have fresh air? I do have fans circulation the Co2 but i don't know if i need to pump fresh air in there or no.
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#6
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I am running 2 1000 hps vented out of the room. I don't under stand why i need fresh air if plants only use co2 and im giving them all the co2 they need and circulating it why fresh air can someone explain
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| air, fresh, needed |
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