Marineland 24-Pack Penguin Rite Cartridge, Size C

Ready-to-use cartridges keep power filter maintenance simple and convenient. Marineland Penguin Rite-Size Filter Cartridges feature a double-thick polyfiber pad on one side to efficiently trap dirt and debris. The other side features a patented ribbed backing that allows even distribution of aquarium water through the super effective Black Diamond Carbon that quickly removes discoloration and dissolved organic pollutants. The result is superior mechanical and chemical filtration to maintain superior aquarium water quality.