Unique
Experienced Auto Grower
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I am running a closed system w/ co2, that is why I follow this. I actually been growing with this chart for years...I see this posted a lot, but I find no information on it relating to Cannabis. And utterly impossible for many home growers suffering through the cold and dry of winter. Also, I see little benefit to those not running closed systems, as you need to keep the CO2 levels high also.