[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. [Fits All] Our biological pond filter foam is designed for CPF series pressure filters, with precise sizing to fit various pond models and capacities. Whether upgrading a small water garden or maintaining a large koi pond, our filter foams ensure a proper fit and maximum filtration efficiency, helping you achieve 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. Ideal for replacing filter foam, foam pads, or upgrading existing 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 changes and varying humidity levels, they maintain filtration efficiency throughout the seasons. Count on our filtration media to keep your water clear and provide a healthier habitat for fish.