Marineland Penguin Bio-Wheel Power Filter Cartridges are designed to meet the absolute highest standards of water purification, performance and operational ease. The cartridge mechanically filters water through a pad of double-thick poly fiber. The result is crystal clear, clean water. Features convenient, color-coded Rite-Size packaging to make it simple to choose the right replacement cartridge. For best results, change every 2 to 4 weeks. Rite-Size C cartridge. Clean, sparkling water is the mark of a healthy, thriving aquarium. The amount of filtration needed to maintain an aquarium depends on a number of variables. These include tank size, individual maintenance habits and fish population. Whatever your individual needs, Marineland has the filtration products you need to deliver on-target, advanced filtration. Size: 0.80 lb

Marineland Penguin Bio-Wheel Power Filter Cartridges are designed to meet the absolute highest standards of water purification, performance and operational ease. The cartridge mechanically filters water through a pad of double-thick poly fiber. The result is crystal clear, clean water. Features convenient, color-coded Rite-Size packaging to make it simple to choose the right replacement cartridge. For best results, change every 2 to 4 weeks. Rite-Size C cartridge. Clean, sparkling water is the mark of a healthy, thriving aquarium. The amount of filtration needed to maintain an aquarium depends on a number of variables. These include tank size, individual maintenance habits and fish population. Whatever your individual needs, Marineland has the filtration products you need to deliver on-target, advanced filtration. Size: 0.80 lb