Replacement Pond Filter Compatible with CBF-200T CBF-350 CBF-350B CBF-350C CBF-550 Exclusively designed for the CBF series, these filter sponge sets are available in three variations to suit different pond sizes, providing a perfect fit and complete filtration for ponds of different capacities. Our CBF pond filter sponge set includes coarse blue sponges for large particle filtration and fine yellow sponges for small particle filtration, ensuring superior water clarity and a thriving aquatic ecosystem. Simplify your pond maintenance routine with easy-to-clean and replace biological filter sponges. Blue and yellow sponges effectively trap both large and small impurities, promoting a pristine pond environment with minimal effort. Made from premium filter foam, our sponge sets offer versatile compatibility with various CPF/PFC pond models. With multiple options for different pond sizes, customize your filtration solution to meet the specific needs of your unique pond ecosystem.