Description
xCrystal-clear water made simple
Tetra Whisper Bio-Bag Disposable Filter Cartridges are designed for both freshwater and marine aquariums. These large cartridges help keep water looking bright and feeling fresh by targeting odors and discoloration while catching debris as fish swim by. The result is a clearer aquarium without complicating routine maintenance.
Core benefits at a glance
- Unassembled carbon cartridge delivers filtration that helps reduce odors and discoloration, supporting water clarity
- Dense, dual-sided mesh traps debris and fish waste while maintaining steady water flow
- Color-coded sizing makes it easy to identify the right replacement for your Whisper filter
- Easy to assemble and quick to replace, so you can keep your tank running smoothly
- Monthly replacement cadence is recommended, or sooner if water clarity or flow declines
How to use and maintain
Designed for straightforward installation in compatible Tetra Whisper units, these cartridges simplify upkeep. To maintain optimal performance, monitor water flow; a noticeable decline signals it’s time for a fresh Bio-Bag cartridge. Keeping replacement cartridges on hand helps keep routine maintenance efficient.
- Replace when you notice reduced water flow from the filter
- Follow a monthly replacement cadence or adjust based on your tank’s conditions
Fitment and compatibility
The Large Bio-Bag cartridges are designed to fit Tetra Whisper 20, 30, 40 and 60 Power Filters, as well as 20i and 40i Internal Filters. The color-coded design helps you quickly remember which size to purchase for your setup.
Real-life use and expectations
In everyday aquariums—whether community tanks, Reef-ready setups, or mixed-species displays—these cartridges work to simplify filtration without overhauling your routine. They offer a practical blend of odor control, debris capture, and reliable flow, which can contribute to a steadier environment for your fish and plants when paired with regular maintenance.
Brand heritage and trust
Since 1951, Tetra has provided products that aim to enhance ease and beauty in home aquariums. These Bio-Bag cartridges reflect that heritage by offering dependable filtration designed for simplicity and consistency, while leaving room for each hobbyist to set their own expectations and routines.
FAQ
Q: What size and filter compatibility does the Tetra Whisper Bio-Bag Large cartridge support?
A: Fits Tetra Whisper 20, 30, 40, 60 Power Filters and 20i/40i Internal Filters.
Q: How often should I replace Bio-Bag cartridges for best results?
A: Replace monthly or sooner if water flow declines or discoloration appears.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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