Tetra Whisper Bio-Bag Cartridge Large - 3pk

For the ultimate in convenience, choose Assembled Whisper® Bio-Bag® Cartridges. Like the unassembled, the packages are color-coded, making it easier than ever to remember which size to purchase.

• Keep water crystal clear
• Removes odor and discoloration
• Fits Whisper Power Filters 20i, 40i, C, 20, 30, 40 and 60