For Penguin 150/125 Power Filters. 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 0.75 ounce of super-efficient pure Magnum Activated Carbon--it keeps working long after most carbons stop. Just shake, rinse and install. 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 monthly.
