500mm PBT Pond Filter Brush

It is a non-powered, submerged filter medium shaped as a long cylindrical brush. A central polypropylene core runs the full 500 mm length, and PBT polyester filaments radiate outward to form a round 120 mm diameter head. The brush sits in a filter chamber in rows; pond water flows through the bristle field at low velocity or by gravity. The filaments capture particles larger than the gaps between bristles, while the bristle surfaces gradually support a biofilm that provides biological filtration.

This product is not a handheld cleaning brush and has no handle or grip. It is an installed component, normally fixed into holder frames, rails, or racks inside a multi-bay pond filter, vortex filter, skimmer box, or settlement chamber. It works by retention and microbial colonization, not by chemical absorption.

Operating considerations: The brushes need periodic removal for cleaning, and their performance depends on water flow staying distributed through the bristle pack. Channels along chamber walls or around loosely spaced brushes reduce contact, so the mounting frame and spacing matter as much as the brush itself. High concentrations of large leaves and string algae may wrap around the bristles; these are better removed by a pre-filter or skimmer before the brush stage.

The standard configuration is 500 mm long with a 120 mm round brush head. Dimensions, bristle density, filament grade, and end details can be adjusted for project requirements.

For saltwater, chlorinated, or chemically aggressive systems, confirm the filament and core grades against the actual water chemistry before specifying. We can match materials to the project when the operating environment is supplied.

• Multi-chamber koi pond filters: brushes in the first or second mechanical chamber collect suspended fish waste and feed particles before water reaches fine media, matting, or biological beds.
• Vortex and settlement pre-filters: the round 120 mm brush pack scrubs the circular water path and catches material that does not fully settle.
• Pond skimmer boxes and intake bays: fixed brush rows filter leaves, algae clumps, and floating debris before the pump intake.
• Recirculating aquaculture and holding tanks: brushes add mechanical screening and biofilm surface area in low-pressure RAS pre-filtration trains.
• Ornamental ponds and water gardens: low-maintenance mechanical stage for suspended organics where clear water is desired without aggressive chemical treatment.

Start with the filter chamber, not the pond volume. Three fit questions decide whether this 500 mm, 120 mm brush works: Can the chamber accept the diameter? Does the row height match the length? Will the brush array leave a bypass path?

• Diameter fit: confirm 120 mm passes into the chamber with enough clearance for the frame. If adjacent brushes are used, set spacing so bristle tips lightly overlap, typically 100–110 mm center-to-center for a 120 mm round brush. A gap larger than the bristle tips creates an open water channel where solids pass through.
• Length fit: 500 mm must suit the usable row or rack height. If the chamber is deeper, brushes can be stacked vertically; if shallower, a shorter cut length or different configuration may be required. The brush should not fold or compress against the chamber lid.
• Mechanical vs. biological priority: for a mechanical-first stage, choose denser bristle packing to capture finer suspended solids, and expect more frequent cleaning. For a biological stage, use slightly more open packing to improve water distribution and biofilm growth across the full length.
• Flow pattern: brushes work best in linear or circular low-pressure flow, not in high-pressure enclosed canisters. If the water bypasses the brush pack, the filter looks clean but does not filter. Choose frames that force water through the bristle field while allowing solids to drop in the chamber.
• Water chemistry: PBT and PP are suitable for typical freshwater ponds and mild treatment chemicals. For saltwater systems, verify material grade and cleaning protocol; for aggressive oxidizers or hot-water washdown, request material compatibility confirmation.

When a brush stage is not the right choice: use bar screens or leaf baskets for large coarse debris, fine foam or bead media for polishing after the brushes, and a dedicated bio-media bed if the system requires separate, high-specific-surface-area nitrification. The 500mm PBT Pond Filter Brush is a retained-solids and biofilm medium, not a pressure filter or a chemical clarifier.

The 500 mm length and 120 mm diameter are standard, but most dimensions and material details can be built to the pond filter system. To quote a custom configuration, provide chamber internal width, row height, brush-to-brush spacing, flow rate, targeted solids, water type, cleaning method, and mounting style. Drawings or photos of the existing rack simplify the definition.

• Dimensions: overall length from 200 mm to 1200 mm or more, brush diameter from 80 mm to 150 mm or custom, round or slightly oval head geometry.
• Bristle pack: PBT filament diameter, stiffness, trim length, density, and color; denser packs for fine solids, more open packs for biological use.
• Core: PP standard; UV-stabilized, reinforced, or alternative core material for saltwater or high-load arrays.
• Mounting ends: plain fixed ends, hanging loops, notches, pins, or threaded ends depending on the filter rack.
• Packaging: bulk pallet for OEM filter builders, individual poly bags, retail-ready labels, or project-specific batching.

For distributor, OEM, and large project requirements, we can support material declarations, inspection, third-party testing, and project-specific documentation as part of the customization process.