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Tetra Whisper Bio-Bag Large Filter Cartridges for Aquariums, 3 Count

Based on 13,304 reviews
Condition: New
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$6.47
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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon

Arrives Sunday, Nov 15
Order within 19 hours and 15 minutes

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At a glance

Condition
New
Style
Standard
Size
3 Count
Dimensions
3.5 x 4.75 x 8 in; 6.4 oz
Weight
6.4 oz
Liquid Volume
5 liters
Item Form
Cartridge
In the box
Whisper Assembled Bio-Bag Cartridge Large (3 pack)
Warranty
See Label.

Features 9

  • 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.

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.

Specs 22

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

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 15

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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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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