Tetra Whisper Bio-Bag Large Aquarium Filter Cartridges, 12 Count for Clear Water

Tetra Whisper Bio-Bag Large Filter Cartridges are disposable aquarium filter replacements designed to help keep water clear and reduce odors and discoloration, with dense, dual-sided mesh and Ultra-Activated carbon.

• Dense mesh on both sides catches debris and fish waste — helps remove visible particles from aquarium water.
• Ultra-Activated carbon absorbs odors — helps reduce unwanted aquarium smells and discoloration.
• Large size fits selected Tetra Whisper Power and Internal Filters — match the cartridge to a compatible filter.
• Cartridges come fully assembled and ready to use — insert one into your filter after rinsing.
• Change monthly or sooner if needed — maintain filtration with a regular replacement routine.

For aquarium keepers replacing a clogged or used filter cartridge, the Tetra Whisper Bio-Bag offers a ready-to-install option for routine water filtration. Its mesh catches debris and fish waste, while carbon addresses odors and discoloration. The cartridge is intended for aquariums with fish at all life stages.

Which Tetra Whisper filters does the large Bio-Bag fit?

The large cartridge fits Tetra Whisper 20, 30, 40 and 60 Power Filters, plus Tetra Whisper 20i and 40i Internal Filters. Choose the cartridge size that matches your filter model; the package is color-coded to help identify the size when purchasing a replacement.

• Large size for the listed Tetra Whisper models.
• Also fits the Tetra Whisper 20i and 40i Internal Filters.

How does the Bio-Bag filter aquarium water?

The cartridge combines dense, dual-sided mesh with Ultra-Activated carbon. The mesh catches debris and fish waste, while the carbon absorbs odors; together, these filtration functions help keep aquarium water crystal clear and remove discoloration.

• Disposable replacement cartridge for a Tetra water filter.
• Made to filter both particles and odors.

How do you install and replace the cartridge?

Rinse the assembled Bio-Bag under cool tap water to remove carbon dust, open the filter lid, and insert the cartridge. Replace it when clogged or when water flow out of the filter is reduced. For best results, change it monthly or sooner if needed.

• No assembly is needed before installation.
• Use reduced filter outflow as a sign to replace a clogged cartridge.

These large replacement cartridges suit aquarium keepers using the compatible Tetra Whisper filters who want a simple way to catch waste and address odors during routine filter care. Tetra has developed fishkeeping knowledge since 1951. With its large size, ready-to-use assembly, dual-sided mesh and carbon filtration, the Bio-Bag is made for regular aquarium filter replacement.