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1" Adhesive Monotub 100% Recycled Disc Filters








Hole size | 1 inch |
Filter size | 40 mm diameter |
These high airflow filters give your substrate and mycelium fresh air while maintaining high humidity levels. Manufactured with a strong 3M adhesive backing, these spun-bonded fiber filters are made from 100% recycled filter material and sized to fit over 1" holes. Filters are slightly larger than monotub holes and are designed to keep out foreign spores and other contaminants. Use them in place of polyfill for time savings, fast application, and better protection against unwanted contamination.
To reuse: Clean with 3% hydrogen peroxide solution, being careful to avoid adhesive.
Spun-bonded fiber filters have a filtration efficiency of 98.84% for particles as small as 0.3 μm.
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Perfect for making your own mono tub
Drilled holes in my own plastic tub, slapped these on it and got good fresh air exchange in the tub.
North Spore
Thanks, Andrew! We appreciate you taking the time to share your experience.

little dots
these little dots are great and take a lot more off the table than expected. They are terrific filters but also occupy no space, inside or outside of the tub. they made sure to leave plenty of space for a wide grip of glue. i have not needed to be concerned with substrate or casing landing on it and potentially causing issues. will be buying these any time i need more, or even for other projects!