Click to expand Tap to zoom SUNSUN CPF-2500/10000/15000/20000 Bio Sponge Replacement Set by SUNSUN Save $-20.00 $20.00 | / SKU SUNCPF2500-S1 CPF-2500 Bio Sponge Replacement Set (4pcs) - $20.00 CPF10000 Bio Sponge Replacement Set (5pcs) - $30.00 CPF15000 Bio Sponge Replacement Set (7pcs) - $36.00 CPF20000 Bio Sponge Replacement Set (5pcs) - $46.00 CPF-2500 Bio Sponge Replacement Set (4pcs) CPF10000 Bio Sponge Replacement Set (5pcs) CPF15000 Bio Sponge Replacement Set (7pcs) CPF20000 Bio Sponge Replacement Set (5pcs) Models 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Success! We will notify you when stocks are back! There was an error signing up for restock notifications. Please try again. Dense CPF Series of Biochemical Filtration Cotton Replacement wool for CPF pond filter (per set)