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Requesting opinions of experienced growers..... Should my fan/filter system be (A) 4” / 195 cfm or (B) 6” / 390 or 440 cfm? Im looking to grow between 1-3 autoflowers Heres what I have... 32” x 32” x 53” tent. viparspectra 450 w led (may possibly add a 2nd one in future). digital...