CPF-15000 Pressure Filter Sponge Kit

Complete replacement sponge kit for CPF-15000 pressurised pond filters. Contains three sponges per set: two coarse-pore pre-filter sponges and one fine-pore polishing sponge — replicating the original factory configuration. All sponges are cut from the same batch of high-resilience polyurethane foam to ensure uniform compression recovery and filtration consistency. Weight per sponge: approx. 180 g. Total set weight: 540 g. Mechanical filtration begins here: water enters the filter housing under pressure, passes through the coarse sponges to remove visible solids (e.g., uneaten food, faecal matter, filamentous algae clumps), then moves into the fine sponge for secondary polishing. This staged approach extends time between cleanings and protects downstream UV sterilisers from fouling. Suited to ponds with medium to high bioload — including those with koi or mixed goldfish populations — where visual clarity and pump reliability are priorities. Works independently of filter age; even older CPF-15000 units benefit from refreshed sponges restoring original flow dynamics and reducing backpressure-related noise.