The 2.5″ Adhesive Monotub Filters are designed to cover standard 2-inch monotub holes, offering a fast, reliable solution for maintaining passive airflow and high humidity in mushroom fruiting chambers. These filters simplify your setup while supporting consistent, clean conditions for colonization and fruiting.

Made from high-permeability filter media and backed with a strong adhesive layer, they install in seconds—no stuffing, taping, or extra tools required. Just peel, stick, and grow.

Each pack contains (24) 2.5″ Adhesive Monotub Filters.

Why Choose 2.5" Adhesive Monotub Filters?

• Supports Passive Airflow – Maintains fresh air exchange while helping retain humidity for ideal fruiting conditions.
• Faster Than Polyfill – No mess, no prep—just peel and press for a tight seal.
• Sized for 2” Tub Holes – Covers standard ports with clean overlap and a secure fit.
• Reliable in Humid Environments – Stays adhered through full grow cycles without sagging or peeling.
• Reusable with Care – Peel off gently and reuse across multiple tubs when handled properly.