[Excellent Filtration Performance] Our CPF filter foam kit features dual-density filtration technology with fine yellow and blue layers to effectively capture large debris and fine particles. These filter foams help maintain exceptional water clarity, supporting a healthy aquatic environment. Ideal for use with pond filter media, filter foam pads, and complete filtration systems. [FIT ALL] Our biological pond filter foam is designed for CPF series pressure filters, with a precise size to fit various pond models and capacities. Whether upgrading a small water garden or maintaining a large koi pond, our pond filter foams provide a secure fit and optimal filtration efficiency for clear water year-round. [Easy to Maintain] Simplify pond maintenance with our easy-to-clean and replace filter foam. The dual-layer biofiltration system captures both coarse and fine debris, reducing cleaning frequency while supporting water health. Suitable for replacing filter foam, pond foam pads, and upgrading filter media to maintain a clean and vibrant aquatic environment. [DURABLE MATERIAL] Made from high-quality filter foam, these pond filter foams deliver reliable, long-lasting performance. Designed to withstand temperature fluctuations and varying humidity conditions, they maintain filtration efficiency throughout the seasons. Trust our pond filtration media to keep water clear and support a healthy habitat for fish.