The Coralife BioCube Filter Cartridge includes 2 replacement cartridges that fit the BioCube 8, 14, 29, and HQI. These cartridges help keep your aquarium water crystal clear and removes discoloration and nasty odors!
It is recommended that cartridges be changed every 4 to 6 weeks.
Note: Formerly called Oceanic BioCube Original Replacement Filter Cartridges. Model #82105.