Marineland designs all their filter cartridges to meet the absolute highest standards of water purification performance and operational ease. Each preassembled Emperor filter 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 Marineland's Black Diamond Premium Activated Carbon. Inside each Emperor cartridge, a patented ribbed backing ensures the even distribution of activated carbon to deliver maximum water-to-carbon contact. There is no "tea bag" effect, no water bypass as with loose or bagged methods. The result? Crystal clear, crystal clean water. Shipping-Weight: 1.8# |