2" Adhesive Monotub PTFE Membrane Disc Filters

6 filters (1 sheet)
$5.99
Quantity

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grow-bags-filters

monotub-supplies

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In Stock. Ships in 2-5 business days.

Trusted by 350K+ Growers

Trusted by 350K+ Growers

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Give your monotub the breathable, controlled environment your mushrooms need. These 2" Adhesive Monotub PTFE Membrane Disc Filters provide reliable fresh-air exchange while helping maintain the high humidity levels essential for vigorous colonization and fruiting.

Each ultra-thin filter is made from PTFE membrane material, a durable, highly breathable media commonly used for mushroom cultivation applications. The high-airflow design helps reduce stagnant air inside a grow chamber without creating an unnecessarily large opening.

A strong adhesive backing makes installation straightforward. Apply the filter over a properly sized hole in a clean, dry monotub surface, pressing firmly around the edges to create a secure seal. The 2-inch format is convenient for common monotub ventilation setups.

These filters are especially useful when building or modifying monotubs for beginners, hobby growers, and experienced cultivators alike. They offer a simple way to support passive fresh-air exchange while helping protect the controlled conditions your substrate and mycelium require.

For best results, install filters before adding colonized substrate, and inspect the adhesive bond periodically. Replace any filter that becomes damaged, heavily soiled, or loose around the edges.

Compact, practical, and easy to use, these PTFE disc filters are a dependable addition to monotub supplies and indoor mushroom-growing equipment.

Frequently Asked Questions

We recommend absolute beginners start with our Spray & Grow Kits, which make growing mushrooms at home super easy.

We want you to have the best possible experience with every North Spore product and guarantee free replacements within 30 days of receipt for any damaged, contaminated, or unusable product.

Absolutely! Mushroom cultivation is a great activity to do with the whole family, whether you'd like to grow indoors or outdoors. If you're new to mushrooms, we recommend starting with a Spray & Grow Kit or a Plant & Grow Kit – both make it easy to grow fresh, organic mushrooms at home.

We are vertically integrated — from culture work all the way to spawn and substrate production — ensuring a quality end product. And our staff mycologists keep up to date on all best practices in our field. Additionally, we have a dedicated QAQC team that tests every batch of grain and substrate before it’s inoculated.

Cluster of brown-capped mushrooms with long, light-colored stems against a white background.

Your Trusted Source for Premium Mushroom Growing Supplies

Whether you’re growing mushrooms at home, in your garden, or at a commercial scale, we offer everything you need to cultivate success. We start with the highest-quality OMRI-listed ingredients, mix them in our state-of-the-art facility, and inoculate them in our custom-built lab, so you can rest easy knowing your product will yield the best results.

Reviews

  • 5 stars: 20 (95%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (5%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jason

Fits perfect

P
Paul Lavigne

Work great a good buy

Thanks for the great review, Paul! We really appreciate your support.

A
Aaron
Filter disc time saver

100x easier and faster than using micropore tape on monotubs.

C
COLLIN HAYDEN
Timely response great product

Work as described. Affordable product and works great

Thanks, Collin! If you need help with anything, please reach out.

F
Faith
Convenient Lil Guys

Happy with my purchase - these filters are made to use multiple times if needed. Holding on well and allowing sufficient airflow in and out of my monotub.

Thank you, Faith!

D
Donald

These are the best filters for nit only the Monotubs, but for any other kind of container you might use!

Thanks, Donald!

N
Nathan Liberty

These are fantastic

Thanks, Nathan!

C
CG
Good filters

They stick well and attach to my Boomr Bin nicely!

Thanks, Chad! We really appreciate the kind review.

S
Shawn
Sticks well

Filter stayed on and worked well

Thanks for the great review, Shawn! We really appreciate your support.

S
Shawn
Worked great

These filters overall worked great and stayed on

Thanks for sharing, Shawn! If you need help with anything, please reach out.

A
Aaron

I prefer the recycled filters over thease.

Difficult to use with gloves on
The adhesive separates from the filter sometimes when removing from plastic sheet. But they are effective.

J
Jason Keene
Good stuff

Filters work great love them

Great to hear the filters are working out for you! We appreciate the review!

B
Brandon

As described

J
Jim

As described

Thank you, Jim!

J
John Richards
Works just as intended

Provides a clean fresh air exchange without loosing too much humidity. Also sticks on very nicely and comes off pretty easy at the end of a grow when you want to start fresh.

Thanks for sharing, John! We're glad these are working well for you.

J
Jordan

Fast shipping, item as described!! Thanks

We really appreciate your support, Jordan! If you need help with anything, please reach out.

N
N
My favorite!

These are my favorite filters to use with my monotub. High quality and reusable from a trustworthy source.

We're so happy you're loving these filters, Nichole! Thanks for the great review.

C
Charlie

As advertised

R
Richard

Much better than the polyfil method. That’s a mess and leaves strands everywhere. The filters are professional and much appreciated.

G
Guy

They’re perfect for 2 inch mono tub hole 

J
Jon

Excellent product