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The Marineland^® brand designs the filter cartridges to meet the absolute highest standards of water purification, performance, and operational ease. Each pre-assembled 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 poly-fiber. Debris and waste particles are trapped, and water is chemically filtered through Marineland Black Diamond^® Premium Activated Carbon.

Inside the cartridge, a patented ribbed backing ensures even distribution of activated carbon to deliver maximum water-to-carbon contact. The result? Crystal clear, crystal clean water.

3 Stage Filtration

1. Mechanical Filtration: The Penguin Rite-Size cartridge filters out dirt and debris while the ribbed back evenly distributes activated carbon for maximum water contact and clarity.
2. Chemical Filtration: Inside the cartridge, Black Diamond Premium Activated Carbon removes odors, discoloration, and water impurities. Replace filter cartridge monthly since carbon deactivates with use. 
3. Biological Filtration: The BIO-Wheel technology delivers superior wet/dry biological filtration for nitrifying bacteria growth...eliminating toxic ammonia and nitrite fast!

Fits: Emperor Pro Power Filter 450, Original Emperor Power Filter 280 & 400

Size: 4 Pack