[Excellent Filtration Performance] Our CPF filter foam kit combines dual-density filtration technology with fine yellow and blue layers to effectively capture large debris and fine particles. These filter foams are designed to maintain exceptional water clarity, promoting a thriving aquatic ecosystem. Ideal for use with pond filter media, filter foam pads, and complete filtration systems. [FIT ALL] Our biological pond filter foam is specially designed for CPF series pressure filters, with precise sizing to fit various pond models and capacities. Whether you're upgrading a small water garden or maintaining a large koi pond, our pond filter foams ensure a secure fit and maximum filtration efficiency, helping you achieve clear water all year round. [Easy to Maintain] Simplify your pond maintenance routine with our easy-to-clean and replace filter foam. The dual-layer biofiltration foam captures coarse and fine debris, reducing maintenance frequency while supporting water health. Ideal for replacing filter foam, pond foam pads, and upgrading filter media to maintain a clean and vibrant aquatic environment. [DURABLE MATERIAL] These pond filter foams are made of high-quality filter foam material, providing reliable and long-lasting performance. Designed to withstand temperature fluctuations and varying humidity conditions, they maintain consistent filtration efficiency throughout the seasons. Trust our pond filtration media to keep your water clear and support a healthy habitat for fish.