Marina Slim Filter Zeolite Cartridge 3pk A293 - Bio-Clear Replacement for S10/S15/S20 Filters

Marina slim filter bio-clear is a genuine replacement cartridge for all three marina slim filter models S10 S15 S20. 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. The easy to use disposable cartridge should be replaced every two weeks for best results. Never replace all filter cartridges at the same time to ensure a constant presence of beneficial bacteria.