Tetra Whisper Unassembled Bio Bag Cartridge, Small, 2 pack

Clear water made simple.They're tough on debris:Ultra-activated carbon absorbs odors and discoloration better than competing brands.Dense, dual-sided mesh catches debris and fish waste.More debris-trapping mesh than other products.And easy on you.Convenient, pre-assembled Bio-Bags are ready to use. Simply open, rinse, and place in your Whisper Power Filter.This Small Bio-Bag fits Whisper Power Filter 3i.