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About Tetra Filter Cartridges - Unassembled
Ultra-Activated carbon absorbs odors. Use these replacement filter cartridges in your water filter - each package is color-coded to make it simple to remember which size to purchase. These replacement filters are assembled and ready to use for your convenience. Clear water made simple. Rinse Whisper Bio-Bag Disposable Filter Cartridges under cool tap water to remove carbon dust. Open the lid of your filter and insert the Bio-Bag cartridge into the filter. Replace a clogged Bio-Bag filter cartridge when there is reduced water flow out of the filter. For best results, change your filter cartridge monthly or sooner if needed. Size medium. Choose the small size filter cartridge to fit the Whisper 3i Internal Filter; choose the medium cartridge to fit the Whisper PF10 Power Filter, 10i Internal Filter and Reptofilter 90 GPH; and choose the large cartridge to fit the Whisper 20, 30, 40 and 60 Power Filters and 20i and 40i Internal Filters.
