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Tetra

Tetra Whisper Bio-Bag Large Filter Cartridges for Aquariums, 3 Count | Ready to Use, Fits Tetra Whisper Fish Tank Filter 10-30 Gal, 20-40 Gal, PF-20, 30, 40, 60, IQ 20, 30, 45, 60, Replace Monthly

  • Based on 13,260 reviews
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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Monday, Sep 21
Order within 23 hours and 14 minutes
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Style: Standard


Size: 3 Count


Features

  • REPLACEMENT CARBON FILTER: Keeps aquarium water crystal clear removes odors and discoloration.
  • CATCHES DEBRIS: Dense, dual-sided mesh filters debris and fish waste.
  • FITS TETRA WHISPER WATER FILTERS: Color coded to make it simple to remember which replacement cartridge size to purchase.
  • CONVENIENT: Replacement filter cartridges are fully assembled and ready to use.
  • USAGE: Change monthly or sooner if needed.
  • Conveniently Assembled and Ready-to-Use
  • Like the unassembled, the-Packages are color-coded, making it easier than ever to remember which size to purchase
  • Easy to Assemble, Easy to Replace
  • Please read all label information on delivery

Description

For 50 years, fishkeeping enthusiasts have looked to the Tetra name for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need–-from a large variety of quality fish food and innovative equipment to test kits and decor. Tetra Whisper Bio-Bag Replacement Cartridges are disposable filter cartridges that work to keep your water crystal clear while also removing odors and discoloration. These medium cartridges are easy to use and fit 20, 30, 40 and 60 Power Filters and 20i and 40i Internals. Each cartridge is ready to use, easy to assemble and easy to replace. Choose convenience and reliability with Tetra Whisper Replacement Cartridges. The ultra activated carbon removes waste particles, odors and discoloration from your aquarium water. Keep a tank that is clean and clear and thriving with proper filtration. Clear aquarium water creates a beautiful tank environment that becomes the focal point of any room.

Brand: Tetra


Liquid Volume: 5 liters


Item Weight: 6.4 ounces


Item Form: Cartridge


Number of Packs: 1


Product Dimensions ‏ : ‎ 3.5 x 4.75 x 8 inches; 6.4 ounces


Item model number ‏ : ‎ 26170


Department ‏ : ‎ Unisex-Adult


Batteries ‏ : ‎ Product Specific batteries required.


Date First Available ‏ : ‎ September 30, 2004


Manufacturer ‏ : ‎ Tetra


Best Sellers Rank: #1,398 in Pet Supplies (See Top 100 in Pet Supplies) #4 in Aquarium Filters


#4 in Aquarium Filters:


Customer Reviews: 4.7 4.7 out of 5 stars (13,260)


Brand Name: Tetra


Number of Packs: 1


Unit Count: 3 Count


Manufacturer: Tetra


UPC: 046798261704


Number of Items: 1


Global Trade Identification Number: 04


Included Components: Whisper Assembled Bio-Bag Cartridge Large (3 pack)


Item Type Name: Replacement Filter


Model Number: 26170


Manufacturer Part Number: AQ-66170


Warranty Description: See Label.


Liquid Volume: 5 liters


Item Weight: 6.4 ounces


Item Form: Cartridge


Pet Type: Fish


Target Species: Fish


Allergen Information: Apple Free


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Easy-to-Use Filter Cartridges for Crystal Clear Water
Style: Standard Size: 3 Count
These Tetra Whisper Bio-Bag cartridges make filter maintenance simple and effective. They come ready to use—just slide into your filter and you’re good to go. The activated carbon does a great job removing odors and discoloration, and the floss traps debris to keep water clean. Perfect for large tanks, and the 3-pack offers good value. If you want hassle-free aquarium upkeep, these cartridges are a reliable choice. ... show more
Reviewed in the United States on November 28, 2025 by Mike Metzger
    • Works great
Great little bags and cheaper than at Walmart
Reviewed in the United States on March 1, 2026 by Mrs. Bigelow
    • Crystal Clear Results (Once I Figured Out the Water Level!)
Style: Standard Size: 3 Count
I’ve been using these Tetra Whisper Bio-Bag Filter Cartridges (Large) for my 30-gallon tank, and they really do the heavy lifting when it comes to keeping the environment healthy for my tetras and snails. Why They Work True "Ready to Use": These come fully assembled. As someone who juggles a busy work schedule and a full house, not having to mess with loose carbon and clips is a huge time-saver. Water Clarity: The dual-sided mesh is surprisingly dense. It catches all the fine debris, and the integrated carbon does a great job of neutralizing those typical "fish tank" odors. Easy Identification: The blue color-coding is a nice touch. It makes it nearly impossible to grab the wrong size at the store. A Note on My Own "User Error" If you’re noticing that your filter is being louder than a "Whisper" or if the flow seems weak, check your water level! I made the mistake of letting the water line get a bit too low. Because the water had to "fall" further from the filter intake, it was creating unnecessary splashing and making the pump work much harder than it needed to. Once I topped off the tank to the appropriate level, the Bio-Bag started performing perfectly again, and the silence returned. Pro Tip: If you have a busy household or a lid that allows for some evaporation, keep an eye on that water line to ensure these cartridges can do their job efficiently. Final Verdict These are reliable, convenient, and effective. I change mine about once a month, and the water stays crystal clear. Just make sure your tank is topped off so the filter can actually do its thing! ... show more
Reviewed in the United States on February 20, 2026 by Dave
    • Work great in 30 gallon aquarium
Style: Standard Size: 3 Count
These work great with my 30 gallon aquarium. Price is awesome
Reviewed in the United States on February 12, 2026 by Shauna Smith
    • ☆DO NOT SHIP☆
Style: Standard Size: 3 Count
Love this product but dinging it a star bc Amazon will absolutely never ship this safely. They can waste boxes on indestructible things and then throw this fragile item in a shipping bag so all you receive is a bag coated in carbon and no usable product. Stopped buying online.
Reviewed in the United States on June 8, 2026 by Ambre Carrier
    • Fabulous and already assembled!
Style: Standard Size: 3 Count (Pack of 12)
These come preassembled and do a great job of keeping a 100 gallon stock tank for an 8 year old peninsula cooter. Turtles are notoriously dirty and it’s not easy to keep his tank clean. Rinse well prior to use! I have 2 filters and I change one of the filters weekly, alternating and rinsing the one I don’t change, very well. These filters make it so much easier to keep his tank crystal clear!! ... show more
Reviewed in the United States on January 22, 2026 by Donna
    • Product
Style: Standard Size: 3 Count
FTS It’s a good product but took long to come and they left the package where someone could of stole it my Neghbor brought it too me I didt know it was here
Reviewed in the United States on March 23, 2026 by Kristina Ann bergmann
    • Would highly recommend
Style: Standard Size: 3 Count
These are cheaper than at the pet store very satisfied with them. Good value you have purchased many times.
Reviewed in the United States on February 18, 2026 by Kimberly Gearhart

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