CPF-15000 Filter Sponge Replacement Set

Replacement set of mechanical filter sponges for CPF-15000 pressure-fed pond filtration units. Includes all sponges required to fully refresh the primary filtration stage. Dimensions match OEM specifications exactly: each sponge measures 24 cm × 12 cm × 5 cm (L×W×H), with consistent density and pore structure across the set. Constructed from non-toxic, pond-safe polyurethane foam tested for UV and chlorine resistance in outdoor aquatic environments. The sponges operate as the first line of defence in a multi-stage filtration process — capturing larger debris before water reaches biological and UV chambers. Their progressive density allows layered filtration: outer layer traps leaves and twigs, inner layers catch finer detritus and suspended algae. This staged capture prevents rapid saturation and maintains steady pump pressure. Recommended for use in UK garden ponds exposed to seasonal leaf fall, bird activity, and moderate fish stocking. Particularly effective in spring and autumn when organic load peaks. Replacing sponges every 12–18 months — or sooner if physical degradation occurs — helps sustain manufacturer-rated flow rates and extends pump lifespan.