Marina Bio-Clear Zeolite Slim Filter Goldfish Cartridge, Pack of 3 - Catch

Marina Bio-Clear Zeolite Slim Filter Goldfish Cartridge, Pack of 3 Product Description Marina Slim Filter Bio-Clear is a genuine replacement cartridge for all three Marina Slim Filter Models (S10, S15, S20). Directions For best results replace 1-2 every 2-4 weeks Box Contains 3 x filter cartridges Ideal for goldfish Contains zeolite and ceramitek The zeolite effectively absorbs toxic ammonia and reduces stress on the fish The ceramitek optimizes biological filtration Should be replaced every 2 weeks for the best results, never replace all filter cartridges at the same time to ensure a constant presence of beneficial bacteria