Cascade Power Filter Bio-Sponge Cartridges are convenient replacements to keep your Cascade filter running at peak efficiency. These duraple bio-sponges optimize colonization of beneficial aerobic bacteria, allowing the filter to remove ammonia and nitrites from your aquarium.

• Optimizes colonization of benedicial aerobic bacteria
• Removes ammonia and nitrites keepting the aquarium healthy
• Convenient, no fuss replacement sponge
• Easy to replace: just slide into your existing frame

Dimensions: 4.5" x 2.5"