Replacement Filter Cartridges, Bio-Floss, Bio-Sponges, Internal Filter Sponges, Carbon Cartridges, & Pro-Carb+Z for the Penn-Plax Cascade Power Filters and Canister Filters. Cascade 100, Cascade 150, Cascade 200, Cascade 300, Cascade 700, Cascade 1200, Cascade 1500. We also have some media for the Cascade Internal Filters. Take advantage of our multi-packs for best pricing.Related Products:Penn-Plax Cascade Replacement Filter Parts.