Tetra Whisper Internal Aquarium Power Filter with BioScrubber

By Tetra
Rated 3.8205 out of 5 stars


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$14.92Chewy Price
$39.79Chewy Price

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This Item – Tetra Whisper Internal Aquarium Power Filter with BioScrubber, 20-40 gal
Rated 3.8205 out of 5 stars
$14.92Chewy Price

Spend $100, Get $30 eGift Card with code: FALL

Tetra Bio-Bag Large Disposable Filter Cartridges, 12 count
Rated 4.6276 out of 5 stars
$10.97Chewy Price

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Tetra Whisper Bio-Bags Large Filter Cartridge, 1 count
Rated 4.619 out of 5 stars
$2.97Chewy Price

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Total Price: $28.86

About This Item


  • Features a submersible filter with a quiet, convenient, 3-stage filtration system—chemical, biological and mechanical.
  • Dual-sided Bio-Bag mesh that catches debris and fish waste with an activated carbon that absorbs odors and discoloration.
  • The bio-scrubber’s solid back allows the water to flow evenly over the bacteria-rich bristles for best performance.
  • Anti-clog design for convenient and easy maintenance also provided by the bio-scrubber.
  • 5-10 gallon uses medium Whisper Bio-Bag Cartridges; 10-30 and 20-40 gallon uses large Whisper Bio-Bag Cartridges.

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Fish TypeMarine Fish, Tropical FreshwaterTropical FreshwaterBetta, Bottom Feeder, Cichlid...Betta, Cichlid, Goldfish, Marine Fish, Tropical FreshwaterMarine Fish, Tropical Freshwater
Aquarium TypeSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, Freshwater
MaterialSynthetic Fabric, MeshPlasticPlasticPlasticPlastic
Capacity (Max)45 gallon/215 GPH

Questions & Answers

64 Customer Questions

What is the minimum amount of water (20 Gallon long tank) in inches needed for this filter to work properly? it is for a turtle
Answer by ChewyJan 12, 2018
To use this product you will need approximately 6-7 inches of water.

Would you recommend a small 5-10 or a 10-20 for a 10 gallon tank?
Answer by ChewyAug 07, 2019
To determine which filter is best for a 10 gallon tank, it's best to consider what type of fish is in the aquarium. For example, if you may have a betta fish then the smaller filter may be more appropriate however, if you may have other species or multiple fish in the tank, then the larger 10-20 may be better.

Can i use 2 filters for a 55 gal tank?
Answer by ChewyJan 23, 2018
You can certainly use 2 filters. Just ensure it's paired close enough to 55 gallons.

stupid question. does it also put some oxygen in the water.
Answer by ChewyJul 21, 2019
Filters move water from the top to the bottom of the tank, thus distributing oxygen throughout the aquarium.

ReviewsWrite a Review

Rated 3.8205 out of 5 stars
273 Ratings
Would recommend to a friend

273 Customer Reviews

Rated 5 out of 5 stars
By Maya on Sep 24, 2023

Nice filter

My daughter has had several different filters. They didn't last. These filters are great. Bought one for back up in case this one dies.

Rated 3 out of 5 stars
By rylee on Sep 10, 2023

does what it needs to do

not necessarily meant for the water capacity of a 40 gallon tank in my opinion, but it does it's job so i can't complain too much as it's only a temp filter.

Rated 2 out of 5 stars
By axie on May 17, 2023

Would not recommend, product misleading

I got this filter for a 20 gallon long tank and would not recommend it to anyone. The filter itself is massive, almost reaching the bottom even tho its the reccomended size. The filter is loud and the stream is not gentle whatsoever. I had it running for about an hour and it left a massive pit in the sand. The filter also left bits of who knows what floating around the tank (i washed it prior to using and there where still things coming off of it). I got this for my axolotl and it just isnt a good fit in every way. I took it out prior to putting my animal back in the tank to avoid it becoming stressed and even before that i was scooping out bits of black particles that came from the filter

Rated 5 out of 5 stars
By Mo on Jun 6, 2023

Works great

The product was larger than expected, but that's my fault bc I accidentally ordered a size up. Mine did not come with suction cups not sure if that is an extra purchase. Does not sit against the side, sort of floats up so just propped a rock beside it and had no issues. INCREDIBLY QUIET!!

Rated 5 out of 5 stars
By CMK on Sep 3, 2023

Great Pump

Bought pump to replace one in 10 gallon aquarium. Cleared water within a day. Like it very much.

Rated 5 out of 5 stars
By love on Jun 6, 2023

Works so well!

This is the first filter i've bought that has lasted more than a few months. I've had this filter for about a year now and it still works like a charm!

Rated 5 out of 5 stars
By Maxi on May 21, 2023

Tetra Whisper Internal Aquarium Power Filter

This filter works so much better than a bigger double one I had.- that only worked for 5 months and was incredibly noisy

Rated 5 out of 5 stars
By pumpkin on May 30, 2023

This works just go fine, easy to install.


Rated 5 out of 5 stars
By TimeBanditFan22 on Sep 28, 2022

Great Filter

I have three cats, and was looking for a filter. That could not be in the way. Of allowing for a tank cover. For the top. When I had goldfish as pets. At age 11. In a 20 gallon aquarium. I had one of those whisper-quiet filters that hung on the side of the tank. It was a great filter. This one is whisper quiet as well. It seems to be reliable in getting the tank clean. It sucks up whatever leftover flakes my two goldfish don’t eat. My cats have said hello to the fish. Sitting by the tank. But, never have really bothered them. I’m glad to have a filter. That can allow for a tank cover. It also is cleaning up the beneficial bacteria. It’s a slow process. But, I think it’s getting the job done on that too. With how powerful it is. Getting the leftover flakes sucked up.

Rated 5 out of 5 stars
By Ritz on Jan 31, 2023

Whisper Filter

Arrived on time, and well packaged. it works well and is very quiet. Very happy with the purchase.