the.fatman.cometh
Well-Known Member
Ok, here's the question....does dry ice produce co2, and can it be used in a grow room?
1500ppm is ideal for plants 2500 could lay you out. some growers will crank it up that high inbetween grows to kill pests and fungi.Thank you sk3tch3 very insightful. So is the 900-1500 ppm safe then?