Marineland Bio-Wheel Penguin Power Filter Cartridges are designed to meet the absolute highest standards of water purification performance and operational ease. Rite-Size A carbon cartridges provide superior mechanical and chemical filtration for crystal clear, clean water.
Each preassembled cartridge slides easily into place, providing superior mechanical and chemical filtration, and making replacement fast, dry and effortless. The cartridge mechanically filters water through a pad of double thick Polyfiber. Debris and waste particles are trapped, and water is chemically filtered through Marinelands Black Diamond Premium Activated Carbon.For best results, change cartridge every 2-4 weeks.Fits: Marineland Penguin 99B, 100B and Mini Power Filters.Dimensions: 4.6"L x 4.7"WPlacement: Black plastic side faces front of filter, blue side faces back.