Filter Brush – 4" x 23" (MAT-FB23)

The 4" x 23" Filter Brush provides high-capacity mechanical and biological filtration for koi ponds, water gardens, and custom pond filtration systems. Its long, dense brush design captures suspended debris, fish waste, leaves, string algae, and other solids while maintaining excellent water flow through the filtration chamber.

The 23" length makes this brush particularly well suited for larger DIY pond filters, settlement chambers, gravity-fed filter systems, and custom koi pond filtration systems. Multiple brushes can be suspended side-by-side or arranged in staggered rows to create an effective mechanical filtration stage before water reaches finer filter media or biological filtration.

The large bristle surface area also provides additional habitat for beneficial bacteria, while the integrated hanging loop allows the brush to be easily installed, removed, and rinsed clean.

Features:

• 4" diameter x 23" long filter brush
• Excellent mechanical filtration for koi and garden ponds
• Captures fish waste, leaves, algae, and suspended debris
• Provides additional biological filtration surface area
• High-flow design minimizes water restriction
• Excellent for DIY and custom pond filtration systems
• Ideal for larger filter and settlement chambers
• Integrated hanging loop for easy installation
• Easy to remove and clean
• Can be installed individually or in multiple rows

Part Number: MAT-FB23
Size: 4" Diameter x 23" Long