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Monotub Adhesive Filter Disks (20-Pack)

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(2 Reviews)
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Item #: FD20 -
Availability: In Stock
Price: $15.99
Retail: $23.99
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(Bulk 20 Pack) Take the guess work out of the air exchange equation with our new Polyfil filter disks. Constructed from a durable synthetic water resistant fiber and 3M adhesive back, these disks...

(Bulk 20 Pack) Take the guess work out of the air exchange equation with our new Polyfil filter disks. Constructed from a durable synthetic water resistant fiber and 3M adhesive back, these disks have the perfect flow rate and density to allow the right amount of air exchange for monotubs, indoor greenhouses (Martha Tents) 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...

Monotub Adhesive Filter Disks (6-Pack)

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(31 Reviews)
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Item #: FD4 -
Availability: In Stock
Price: $5.99
Retail: $6.99
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We teamed up with Micropose in 2019 to create the original Monotub disk to say goodbye to polyfil! Our disks are rated for proper air flow unlike many cheap knockoffs. We take the guess work out of...

We teamed up with Micropose in 2019 to create the original Monotub disk to say goodbye to polyfil! Our disks are rated for proper air flow unlike many cheap knockoffs. We take the guess work out of the air exchange equation with our newly designed Polyfil filter disks. Constructed from a durable synthetic water resistant fiber and 3M adhesive back, these disks have the perfect flow rate and density to allow the right amount of air exchange for monotubs, indoor greenhouses (Martha Tents) or any...

Round Air Filter Vents 0.22 Micron with 3M Backing (50-Pack)

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Item #: FV3 -
Availability: In Stock
Price: $11.00
Retail: $19.99
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These 0.22 Micron Air Filtration Disks acts as a tool to allow gas exchange in culture containers, grain jars and liquid cultures. The strong 3M adhesive can withstand autoclave temperatures in...

These 0.22 Micron Air Filtration Disks acts as a tool to allow gas exchange in culture containers, grain jars and liquid cultures. The strong 3M adhesive can withstand autoclave temperatures in excess of 250F at 15psi for extended periods when kept covered and dry during sterilization. The overall diameter of the filter is 19mm and the air hole is 10mm (.39"), perfect for standard 1/4" jar lid holes. This product can be stuck to clean hard surfaces, including standard metal jar lids and...

Wide Mouth Jar Cultivation Lids with Injection Port (6-Pack)

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(1 Reviews)
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Item #: LD6 -
Availability: In Stock
Price: $12.00
Retail: $16.99
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Our cultivation lids fit precisely on any "wide mouth" 90mm canning jar which are commonly used by today's cultivators. They feature a large high quality synthetic 22mm 0.2 Micron filter, the...

Our cultivation lids fit precisely on any "wide mouth" 90mm canning jar which are commonly used by today's cultivators. They feature a large high quality synthetic 22mm 0.2 Micron filter, the highest level of filtration available. Usage of these allows a fresh, constant air exchange while preventing the entrance of unwanted contaminates. Use them for cultivating and grain spawn or liquid culture media. The self-healing injection ports are made to withstand many inoculations and will not...

Tyvek Wide Mouth Synthetic Filter Discs with Injection Port (6-Pack)

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(7 Reviews)
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Item #: FD1 -
Availability: Out of Stock
Price: $9.00
Retail: $12.00
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(ON SALE ) These are the synthetic filter discs that are featured on our Quick Colonizing 5-grain Jars. They are thick reusable and have a filter level of .2 microns, the highest level of filtration...

(ON SALE ) These are the synthetic filter discs that are featured on our Quick Colonizing 5-grain Jars. They are thick reusable and have a filter level of .2 microns, the highest level of filtration available. These synthetic filters discs fit precisely on any "wide mouth" 90mm canning jar which are commonly used by today's cultivators. Usage of these discs allows a fresh, constant air exchange while preventing the entrance of unwanted contaminates. Use them in place of jar lids, or just drill...

Mushroom Filter Disks

Mushroom filter disks protect your mushrooms from contaminants like bacteria, mold, and pests while still providing adequate airflow. They fit tightly on canning jars, monotubs, indoor greenhouses, and other growing containers.

If you need synthetic filter disks for your mushroom grow, you can find them at Midwest Grow Kits. Our filter disks are built for quality, durability, and efficiency. They're made from water-resistant fibers and strong 3M adhesive and have the optimal flow rate and density for ventilation. And whether you need just a few mushroom filter disks or want to buy bulk, we have a variety of affordable packages that will accommodate your needs.