Marina Bio Clear Cartridge for Slim Filters, 3 pack

Marina Slim Filter Bio-Clear is a genuine replacement cartridge for all three Marina Slim Filter Models. Ideal for goldfish, the filter cartridge contains zeolite and Ceramitek for optimum filtration and a healthy aquarium.

The zeolite effectively adsorbs toxic ammonia and reduces stress on fish, while the Ceramitek, a highly porous ceramic biological filter medium, optimizes biological filtration.