Description
xOverview
Cunina’s Large Filter Cartridges are designed to replace the core filtration in your Tetra Whisper systems, offering reliable debris capture and clearer water without complicated setup. This 6-pack is built to fit Whisper Large 20i and 40i filters, as well as IQ models 20, 30, 45, 60, and PF series 20/30/40/60, giving you a straightforward upgrade for compatible aquariums.
What makes them work
Each cartridge combines a dual-sided mesh with an activated carbon layer and a non-woven fabric. The dual-sided mesh provides broad surface area to trap debris and waste, while the carbon helps reduce impurities that can contribute to odors and taste. The non-woven layer captures fine particles, helping protect the filter and promote clearer water in daily use.
Real-life use and benefits
In everyday tanks—from community setups to fry tanks—these cartridges offer a practical upgrade to standard replacements. Many users notice crisper water, reduced odors, and a steadier water appearance with regular changes. Results vary with bioload, but the cartridge is designed to support consistent filtration when kept clean and replaced on a sensible schedule.
Easy to use and maintain
All cartridges arrive fully assembled and ready to install. To prep, soak the cartridge for five minutes and rinse for 30 seconds before first use. When replacing, remove the used cartridge, flush the new cartridge under cool water to remove dust, then insert it firmly into the chamber until it sits securely.
Maintenance and value
We recommend monthly replacement to help maintain water quality and optimal filter performance; exact timing depends on your tank’s bioload. The 6-pack offers a convenient supply for ongoing upkeep, with individual packaging to preserve freshness during storage.
Key benefits
- Clearer water and reduced odors for a more inviting tank ambiance
- Debris and waste capture to help protect the filter and fish
- Activated carbon targets impurities and enhances water quality
- Ready-to-use out of the box with minimal setup
- Six-pack value supports regular maintenance without guesswork
What you get in the box
- Six large filter cartridges compatible with Whisper Large 20i/40i, IQ models, and PF series
- Individually packaged to preserve quality
- Fully assembled design for quick, hassle-free replacement
FAQ
Q: Are Cunina Large Filter Cartridges compatible with Tetra Whisper filters?
A: Yes, these cartridges fit Whisper Large 20i/40i, IQ models, and PF series variants.
Q: What prep steps are recommended before first use?
A: Soak for 5 minutes, rinse for 30 seconds, then install firmly in the filter chamber.
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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