EW-604 Aquarium External Filter Pre-Filter (4 Pack)

Keep your aquarium circulation running smoothly with the EW-604 Pre-Filter Sponge Set. This pack includes 4 sponge filter cartridges designed for external aquarium filters. Includes: 4 sponge filter cartridges Compatibility: EW-604 and HW-604 external filters Material: sponge filtration media Usage: rinse before use and replace as needed Enhance your filtration system today — order the EW-604 Pre-Filter Sponge Set.