3" Adhesive Monotub PTFE Membrane Disc Filters

Give your monotub reliable fresh-air exchange without sacrificing humidity. These 3" Adhesive Monotub PTFE Membrane Disc Filters provide a clean, low-profile way to support the gas exchange your substrate and mycelium need during indoor cultivation.

Made from ultra-thin PTFE membrane material, each filter is designed for high airflow while helping maintain the humid environment essential for consistent monotub performance. The breathable surface allows air movement without leaving your chamber completely open to the surrounding environment.

Installation is simple: apply the strong adhesive backing over a properly sized monotub ventilation hole. Once secured, the filter creates a practical barrier that helps keep your grow chamber covered while allowing passive fresh-air exchange.

These monotub supplies are well suited to new builds, replacement filters, and chamber modifications. Their compact 3-inch format works neatly on monotub walls and other mushroom grow chamber applications where space and a clean appearance matter.

For best results, apply filters to a clean, dry surface and press firmly around the edges. Avoid covering the membrane with tape, debris, or excess moisture, as unrestricted airflow is important for proper function.

Whether refining a first monotub or maintaining an established indoor growing setup, these adhesive PTFE filters offer a straightforward way to balance ventilation and humidity with fewer loose components to manage.