Coralife BioCube Original Filter Cartridge Replacements (2-Pack)
Replacement BioCube Filter Cartridge, 2-Pack, for all the Oceanic BioCube Aquariums and Coralife BioCube Aquariums.
This is the Oceanic 8 BioCube Filter, Oceanic 14 BioCube Filter,
Oceanic 29 BioCube Filter, Coralife 14 BioCube Filter & Coralife 29
BioCube Filter. Coralife recommends, for optimum efficiency, cartridges
should be replaced every four to six weeks.