Tetra Whisper Bio-Bag Disposable Filter Cartridge, Large (12 Pack)

The Tetra Whisper Bio-Bag Disposable Filter Cartridges, Large (12 Pack), fits the Whisper 20i, 40i, C, 20, 30, 40 and 60 Power Filters.

Instructions for installing a new Bio-Bag Filter Cartridge:

• Place plastic framing inside floss pouch/bag
• Empty contents of 1 carbon bag into floss pouch/bag
• Secure top of cartridge with clip to form a tight seal
• Rinse the Bio Cartridge briefly under running water to flush away any carbon dust.
• Slide the cartridge into the grooves of the filter track properly.
• Change the Bio Cartridge every 3-4 weeks. If your filter includes a Bio Foam Pad, your may also use it along with the Bio Cartridge.

Note: To get the super low price of $14.49 each, you must purchase a minimum of at least two 12 packs.