Replacement Pond Filter Pads for SUNSUN/Grech CPF-2500 CPF-3500 & VIVOHOME/VEVOR/VIVOGROW 1580/1840 GPH Pressure Pond Filters — 2 Fine (Yellow) + 2 Coarse (Blue), 9”(Diameter) x 2”(H)

Compatible with SUNSUN/Grech CPF-2500/ CPF-3500 and VIVOHOME/VEVOR/VIVOGROW 1580/1840 GPH pressure pond filters, these pond filter pads are designed for koi ponds and other pond filtration systems to handle routine replacement needs. The pads use a two-stage filtration layout: low-density blue sponges trap larger particles and debris, while high-density yellow sponges provide fine filtration to remove suspended matter, food residue and other impurities, keeping water clearer and extending the life of your pond pump filter. Constructed from high-quality filter sponge material, the SUNSUN/Grech pressure filter pads offer good toughness, breathability and water permeability. CPF-2500 pond filter parts resist deformation and damage, ensuring long-lasting performance and fewer replacements. The kit contains 2 high-density yellow sponge pads for fine filtering and 2 low-density blue sponge pads for coarse filtering. Each pad measures 9”(Diameter) x 2”(H). These sponges are washable and reusable; it is recommended to clean the pond sponge filter every 2 months (adjust according to water flow) and to replace the filter mat every 6–12 months to sustain optimal filtration efficiency. NOTE: Because pads may be vacuum-compressed for shipping and temporarily appear thinner, soak them in clean water for 5–10 minutes before first use to restore original thickness without affecting filtration performance.