Absorbs toxic ammonia and reduces fish stressContains Ceramitek, a highly porous ceramic biological filter mediumEffectively removes pollutants and odorsCompatible with Marina S10, S15 and S20 Slim Aquarium FiltersBundle includes 3 Bio-Carb filter cartridges and 3 Bio-Clear filter cartridges The Marina Slim Filter Plus Ceramic Cartridge bundle include one 3-pack of Bio-Carb filter cartridges and one 3-pack of Bio-Clear Filter cartridges. The Marina Slim Filter Bio-Carb Plus Ceramic Cartridge combines activated carbon and Ceramitek in one cartridge for a healthy aquarium. The activated carbon effectively removes pollutants and odors, while the Ceramitek, a highly porous ceramic biological filter medium optimizes biological filtration. The Marina Slim Filter Carbon Plus Ceramic is best used in tropical fish aquariums. The Marina Slim Filter Bio-Clear Plus Ceramic Cartridge combines Zeolite and Ceramitek in one cartridge. The Zeolite effectively adsorbs toxic ammonia and reduces stress on fish, while the Ceramitek optimizes biological filtration. The Marina Slim Filter Zeolite Plus Ceramic is best used in goldfish aquariums. These easy-to-use disposable cartridges should be replaced every two weeks. Never replace all filter cartridges at the same time in order to ensure constant presence of beneficial bacteria. For more fish tank accessories check out the other Marina products including aquarium filters, filter media, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Marina has a wide variety of products that are perfect for your pet fish or betta fish to enjoy in any large fish tank, small fish tank or in a freshwater tank. Track Page Views WithAuctiva's Counter