How Do I Make A Pre Filter For My Grow Tent?
How Do I Make A Pre Filter For My Grow Tent? Step 1: Prepare the Two Pencil Holders. … Step 2: Drill Holes on the Bottom Surface of the Cups. … Step 3: Put Both of the Cups into the Socks. … Step 4: Fill them Up with Activated Carbon. … Step 5: Seal the