[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 Models] 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 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. Perfect for replacing filter foam, pond foam pads, or upgrading existing filter media to maintain a clean and vibrant pond ecosystem. [Durable Material] Made from high-quality filter foam, these foams deliver reliable, long-lasting performance. Designed to withstand temperature changes and varying humidity, they maintain filtration efficiency in all seasons. Count on our pond filtration media to keep your water clear and provide a healthier habitat for fish.