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  1. W

    The Best Diy Ez Walmart Carbon Filter for Micro Grows Zen Style

    Disregard my fan question. I found a 4" 120VAC muffin fan (120 CFM) at my local surplus house.
  2. W

    The Best Diy Ez Walmart Carbon Filter for Micro Grows Zen Style

    What would be the min fan CFM would be needed for a 6' tall cabinet?
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