The Physics of Biological Extraction: Engineered for Field Conditions

Stop fighting flimsy nylon meshes that pack tight like a brick, or low-grade organic bags that trap your best biology, rot out, and harbour anaerobic pathogens between runs.

The STS Reusable Poly-Mesh Microbial Extraction Filter is a masterclass in smart, low-tech resource optimization. Tested and vetted at the Sustainability Testing Station (STS), this filter features a high-density, elastic polypropylene micro-weave that hits the absolute golden volumetric corridor for Actively Aerated Compost Tea (AACT). It is tight enough to trap fine silt and raw carbon sediments, yet dynamically flexible enough to let massive beneficial fungal hyphae and diverse soil microbes pass completely unhindered into your water column.

The Design Advantages:

• High-Density Polypropylene Micro-Weave: 100% synthetic and hydrophobic. It doesn’t absorb water or organic residue, meaning it dries near-instantly and completely suppresses unwanted anaerobic biofilm cross-contamination between batches.
• Superfine Mesh: Equivalent filtration efficiency of 1-15 micron. [0.001-0.015mm]
• High Linear Elasticity: Open-ended, stretchable cylindrical geometry allows the biological base material to roll and tumble dynamically under the pressure of rising air bubbles, maximizing extraction efficiency.
• Integrated 7-Core Lashing Cord: Includes a 50cm cut of heavy-duty 4mm rot-proof paracord. Choke-hitch the top of the filter closed and loop the tail over your bucket handle for safe, clean extraction without fishing around blindly in dark, frothy microbe tea.
• Industrial Maintenance Level: Zero zippers to rust or jam with worm castings. To clean, simply turn the filter inside out, rinse it down thoroughly with a garden hose, and hang it up. Built to survive dozens of active brewing cycles.