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Your cart is empty.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.
Me
2025-09-07 11:07:02
Honestly this is a great deal. I could spend way more on filters thankfully I found these. Really good price. I love the quality to it especially the carbon in it. I’ve noticed it prevents algae growth in my tank and filters out particles in the water. Very good performance. I’ve used tap water with fish solution but it had particles floating on the top cause the solution like made them float, a few hours later I couldn’t see those particle's on top of the water as they got filtered out by the carbon in it I believe. I have not seen any safety concerns that I would like to mention and have not noticed any safety with this specific product very safe to use. My last fish died because it got caught behind its water heater, I’ve never had issues with this filter part. Really no issues in general at all. Very easy to use. Just find the right fit before you buy.
Anonymous001
2025-08-21 17:45:59
Great Product! I was a little bit worried because people had "black stuff" In their package and claimed they were used. That is 100 PERCENT FALS To inform everyone it is completely safe to use ( these filters have activated carbon which tells you what that is . This price is 50% less than the this brand at pet stores. No matter what others tell you Amazon delivers the package with care and pride. It was also very nicely packaged. The longevity is the same as the pet store or something similar. It is never the less the best brand ever for Fish filter needs . ( Just please rinse the filter in water before you use it)
Seraph of the Indigo Sea
2025-07-29 10:39:17
Easy to use, low noise level, easy install, perfect size, safe, and I find Tetra products to be quite satisfactory all around. Keep purchasing them.
Mijohol
2025-07-24 15:55:38
This works great for my fish tank and it fits perfectly in the filter
Marshall
2025-07-08 15:18:39
Decent filters for the price. They are the same as the old ones except you don't need to add the carbon and put it together. These are pre-made. That being said, the box came fairly beat up and there was some loose material inside. It looked like some carbon had come out. They seem OK, just not as high quality as the previous way they packaged them.
DocSue1
2025-07-04 18:35:47
These arrive pre-assembled and so they are ideal for today's busy lifestyles. Great value for money.
Tabby
2025-04-10 18:16:56
These filters are the perfect size for a filter for a Betta tank. They're very simple to install too, all you gotta do is slide them into the filter. They're super strong so they can last months on end and be cleaned multiple times. They also allow water to flow freely through the filter so it doesn't make your filter noisy.
Cindy R.
2025-03-20 17:55:48
These are great. I have to change every 3 weeks for my 1.5 gallon fish bowl
M.Cecilia
2025-03-10 15:02:24
Serve perfeitamente na bomba para aquaterrarium que tenho. Qualidade do filtro é excelente.
Khaldoun
2025-02-15 10:09:06
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dasher
2025-02-11 15:57:15
well i usually buy these on amazon as the petstore is either out of stock or almost dble the price..the seller i usually use here has a 12 pack..the ones you have to put together and there just over $28.00 now..Had time to search around and found this seller..its a 3 pack already done and ready to drop into your aquarium filter..I iorder 3 boxes at $4.97 each..so 9 filters were around $1.65 each..if i had gone with the 12 pack from the other supplier they worked out to $2.33 each and you get the mess of adding the charcol ..Great deal and exactly what i needed and these are Tera filters..will buy here again!
Alejandro
2025-01-13 16:48:03
Quedan perfectos en el filtro y limpian muy bien, además el precio se me hizo muy bueno!
Miguel
2025-01-02 18:14:38
BUEN ARTICULO, FILTRA BIEN LOS RESIDUOS
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