Tetra Whisper Bio-Bag Cartridge replacements complete the Whisper Power Filter package for a clean, easy-to-maintain aquarium. Filled with ultra-activated carbon, these ready-to-use disposable filter cartridges remove waste particles, odors and discoloration for crystal clear water.

• Genuine Whisper filter cartridge replacements
• Keeps water crystal clear
• Removes odors and discoloration

Bio-Bag cartridges are tough on the debris that makes aquariums nasty. Ultra-activated carbon absorbs odors and discoloration and dense, dual-sided mesh catches debris and fish waste better than other brands to keep your fish tank clean. Replace cartridges once a month for maximum filter efficiency.

Tip: Replace Bio-Bag cartridges when water begins to overflow excessively from the Wonder Tube chamber.

Sizing:

• Small : Fits Whisper In-Tank Filter 3i
• Medium: Fits Whisper Power Filters 10i, E, J, 10 and MicroFilter
• Large (formerly Regular): Fits Whisper Power Filters 20i, 40i, C, 20, 30, 40 and 60
• X-Large: Fits Whisper Power 4 and 5 Power Filters