Magnum Micron Cartridge Water Polishing Filter Pet Supply. Pet Supply » All Pet Products » Tropical Fish » Ponds » Accessories » Equipment » Filter » Filter Cartridges Filter • Filter Pads Filter • Foam Inserts Filter • Filter Resins Filter • Filter Sleeves Filter • Filter Carbon Magnum Micron Cartridge Water Polishing Filter buy bestselling pet products, supply find reviews, ratings, prices List Price: $16.81 You Save: $0 Features • 6.5" l x 3" diameter [ + Zoom ]   [ Buy Now ] Pet Products : Usually ships in 1-2 business days Non User