Penguin 170/200/330/350 Cartridges - 3 Pack (C)

Each pre-assembled Rite-Size cartridge filters water through a double thick polyfiber pad which traps more dirt and debris, faster. The cartridge is packed with super-efficient pure Magnum Activated Carbon. It keeps working long after most carbons stop.

It's better than a bag! Just shake and rinse. The patented ribbed backing evenly distributes carbon for maximum water-to-carbon contact. No bypass, no "tea-bag" effect. Just crystal clear, crystal clean water. For best results, change at least monthly. Three cartridges per bag. Each cartridge measures approximately 6" W x 6-3/4" H. Designed specifically for the Marineland Penguin 160, 170, 300, and 330 filters (with or without the Bio-Wheel).