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Monotub Adhesive Filter Disks (20-Pack) Polyfil filter disks, air exchange, monotubs, indoor greenhouses, Martha Tents, humidity, flow rate, density, 3M adhesive back, synthetic fiber, water-resistant, Hydrogen Peroxide, re-used, circular, polypropylene, ventilation holes, lid, contaminants, bacteria, airborne particles, micron rating, 0.2 microns, adequate air flow, sterile,

Monotub Adhesive Filter Disks (20-Pack) (FD20)

5.00 stars, based on 24 reviews
A monotub filter disk is a circular piece of material, typically made of polypropylene, that is used to filter the air entering a monotub used in the cultivation of mushrooms.The filter disk is placed over the ventilation holes on the top of the...

Filter discs

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Quality product. Arrived quickly!

Filter patches

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  • Easy to use
  • Price
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These things are also perfect. They fit my tub and allow FAE. Incredible product.

good quality products that last

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I've never had any complaints from Midwest everything comes on time and is always good quality products that last

Great deal

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Pros:
  • Plentiful
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  • Little smaller than need but will work
It’s awesome there comes with as many as they do. I’ve bought ones in the past only get 6 in a pack and that didn’t go far for my tub building

Great Filters

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Better than the cheap paper ones.