Coralife BioCube Original Filter Cartridge Replacements, 2-Pack (3X2 Pack)
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THIS IS THREE OF THE THE 2-PACKS (6 Cartridges Total). Replacement BioCube Filter Cartridge, 2-Pack, for all the Oceanic BioCube Aquariums and Coralife BioCube Aquariums. This is the Oceanic BioCube Size 8, 14 & 29 Filter, and Coralife Size 14, 16, 29 & 32 Filter. If you have a BioCube, this is the replacement filter. Coralife recommends, for optimum efficiency, cartridges should be replaced every four to six weeks.