Item #: FD4
Availability: In Stock
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(NEW!) Take the guess work out of the air exchange equation with our new Polyfil filter disks. Constructed from a durable 3" plastic ring and 3M adhesive back, these disks have the perfect flow rate and density to allow the right amount of air exchange for monotubs or any bulk casing style grow. They keep humidity in and allow for the high levels of air exchange needed for any tub or greenhouse. Simply peel and stick over any size hole up to 2.5" diameter. Can also be re-used!

Features & Includes:

  • 6 Polyfil filter disks
  • 3" diameter disk
  • Covers holes up to 2.5"
  • Installs in seconds to any container or Greenhouse
  • Custom manufactured to our specs!
  • Filters and regulates air exchange
  • Reusable!
Retail: $7.99
Price: $5.00
You Save: $2.99 (37.4%)

    Quantity:

    (NEW! Version 2.0) Take the guess work out of the air exchange equation with our newly designed Polyfil filter disks. Constructed from a durable 3" plastic ring and 3M adhesive back, these disks have the perfect flow rate and density to allow the right amount of air exchange for monotubs or any bulk casing style grow. They keep humidity in and allow for the high levels of air exchange needed for any tub or greenhouse. Simply peel and stick over any size hole up to 2.5" diameter. Can also be re-used!

    Features & Includes:

    • 6 Polyfil filter disks
    • 3" diameter disk
    • Covers holes up to 2.5"
    • Installs in seconds to any container or Greenhouse
    • Custom manufactured to our specs!
    • Filters and regulates air exchange
    • Reusable!

      Overall Customer Rating of 6 Reviews:
      Mi

      Gas exchange + maintaining a clean environment = win

      Rating:
      Pros:
      • Easy to use
      Cons:
      Picked these up to use on my Ecosphere set up to improve gas exchange throughout my grow process. The air quality inside the tent smells fresher without reducing my humidity or affecting temperature in a meaningful way.

      I love being able to just buy what I need and trust that Midwest has done the homework for me :)

      Love the new style!!

      Rating:
      Pros:
      Cons:
      Long time customer! I bought these last year when you guys had a different version, I love the new material and now I can re-use!! These are worth their weight in gold! I was getting mold in my bulk grows and couldnt figure out why, go figure I was putting too much polyfil in the holes. I swapped out to these and never had a single issue since!

      Vernal, Ut

      Mr. Mushroom

      Rating:
      Pros:
      • quality
      • customer service
      • customer service
      Cons:
      • they dont carry all the products i need
      I love these guys, they always have excellent products, and as far as fast shipping, I placed a couple orders with a few different companies about a week prior to this order, and received my order from Midwest a few days BEFORE my other orders. One of my main suppiers.. 100% satisfaction every time. oh yeah, I almost forgot.. these guys customer service is excellent as well. well ran company for sure.

      Vernal, Ut

      New Disks

      Rating:
      Pros:
      • quality
      • shipping
      • customer service
      Cons:
      These disks are great! High quality O-ring is very sturdy! I ordered a Bulk Kit a month ago and it was before they had this product, I emailed support after seeing the change and they sent me these for free. They are great, easy to apply and really do provide the perfect amount of air exchange for a bulk grow! 5 star plus!

      Dope!

      Rating:
      Pros:
      Cons:
      Plug in play! Love it. Easy as slappin a sticker on. awesome quality

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