Marina Slim Filter Zeolite Plus Ceramic Cartridge 1.5" length x

Ideal for goldfish the Marina Slim Filter Zeolite Plus Ceramic Cartridge combines Zeolite and Ceramitek in one cartridge for a healthy aquarium. The Zeolite in the Marina Slim Filter Zeolite Plus Ceramic Cartridge effectively adsorbs toxic ammonia and reduces stress on your fish. The Ceramitek, a highly porous ceramic biological filter medium optimizes biological filtration. The Marina Slim Filter Zeolite Plus Ceramic Cartridge is easy to replace and fits all Marina Slim Power Filters. The Marina Slim Filter Zeolite Plus Ceramic Cartridge should be replaced every two weeks, your should never replace all filter cartridges at the same time in order to ensure constant presence of beneficial bacteria.