I am growing Cheese XXL and Moby Dick XXL autos and its 2 months and the plants look pretty short and small ... just 60cm. Probably because I don't have enough airflow? I have a small intake fan and outtake is just a hole in the chimney.
One more question. Do I understand right that 1000 m3/h fan is good to use, if length 4.80 meters, width 2.80, and height 2.20? I don't use any filter.
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