The included mesh filter bag contains over 1/2 lb of Activated Carbon. The Activated Carbon absorbs impurities in your aquarium water. Removes dissolved organic waste that can stress tropical fish and discolor your aquarium water. Activated Carbon Filter Media should be replaced every 4-6 weeks.
Alternate the replacement of Activated Carbon Media with a mechanical filter to maintain biological filtration. Designed for the Nano Cube aquarium filter and other aquarium filters requiring activated carbon. Can be used in freshwater or saltwater aquariums.
Replacement Activated Carbon for all JBJ 6 Gallon, 12 Gallon and 24 Gallon Nano Cubes