1. [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. 2. [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 maintaining a small water garden or a large koi pond, our pond filter foams provide a secure fit and efficient filtration performance, helping achieve clear water year-round. 3. [Easy to Maintain] Simplify pond maintenance with our easy-to-clean and replace filter foam. The dual-layer biofiltration foam captures both coarse and fine debris, reducing cleaning frequency while supporting optimal water conditions. Ideal for replacing filter foam, pond foam pads, and upgrading filter media to maintain a clean and vibrant aquatic environment. 4. [Durable Material] These pond filter foams are made from reliable foam material, offering consistent and long-lasting performance. Designed to withstand temperature changes and varying humidity levels, they maintain filtration efficiency in all seasons. Trust our pond filtration media to keep water clear and support a healthier habitat for fish.