Upgrade your pond filter pad with our replacement sponge filter media pad, suitable for CPF-2500. These pond filter replacement sponges ensuring a fit and efficient operate, making maintenance easily. Replacement sponge filter media pad effectively visible debris, food residues, and impurities, without impeding water flows, while providing essential filter to decompose harmful substances. Crafted from soft, foldable Sponge with high elasticity and excellent air and water permeability, pond filter sponge replacement pad are stable and won't harm your fish. The inner structure prevents blockages, maintaining normal water flows. Package includes: 4Pcs Replacement Sponge Filter Media Pad