Tetra Bio-Bag Medium Disposable Filter Cartridges, 12 count

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About This Item

Details

  • Convenient, easy-to-use, three-stage filtration cartridges designed to help keep your aquarium crystal clear.
  • Ensures mechanical and biological filtration.
  • Ultra-activated carbon works to absorb discoloration and odors, keeping your fish tank in tip-top condition.
  • Double-sided mesh is dense to trap fish waste and debris.
  • Disposable Bio-Bags are available in an 8-count and 12-count option.

Instructions

Learn More About Tetra From Our Team of Experts

Questions & Answers

6 Customer Questions


is this filter interchangeable for a top fin silent stream small filter cartridge 5.5 x 3.1?

Answer by ChewyJul 16, 2019
These Bio-Bags are designed to fit Tetra's Whisper Power Filters 10, 10i, E, J and Microfilter.

Would these work for the 5 gallon glofish tank?

Answer by ChewyJul 31, 2018
These cartridges are intended for the Whisper Power Filter package

Does the frame come in the box?

Answer by ChewyJul 11, 2018
This includes one frame.

Will these fit a Whisper for 20 gallon?

Answer by ChewyAug 01, 2021
These Medium Filter Cartridges will not be compatible with the Tetra Whisper Power Filter for Aquariums. That filter will need the Large Filter Cartridges.

4.8
Rated 4.8 out of 5 stars
243 Ratings

96 Customer Reviews



Rated 5 out of 5 stars
By Jenifer on Dec 10, 2025

just right for what I needed

Unfortunately I ordered the large size, but that was too big. So, I ordered the medium and that was just right!

Unfortunately I ordered the large size, but that was too big. So, I ordered the medium and that was just right!


Rated 5 out of 5 stars
By Scherry on Oct 15, 2025

I'm glad I was able to find these!

I've been trying to find these bio-bags for a while. I'm happy chewy had them.

I've been trying to find these bio-bags for a while. I'm happy chewy had them.


Rated 5 out of 5 stars
By Holli on Jan 14, 2026

Price

It keeps there tanks clean

It keeps there tanks clean


Rated 5 out of 5 stars
By Mells on Oct 6, 2025

Easy to use!

Last about 3 weeks. I like that there is a lot of packets!

Last about 3 weeks. I like that there is a lot of packets!


Rated 2 out of 5 stars
By Patricia on Jul 14, 2025

i received the wrong size filter

i was having trouble adding to my autofill and called for help. the operator ordered me the wrong size for my new filter

i was having trouble adding to my autofill and called for help. the operator ordered me the wrong size for my new filter


Rated 5 out of 5 stars
By Kathy on Jul 27, 2025

Good price

I change my aquarium filter once a month and this is easy to use.

I change my aquarium filter once a month and this is easy to use.


Rated 5 out of 5 stars
By Anita on Nov 14, 2025

Good product for a good price.

Good name brand product.

Good name brand product.


Rated 1 out of 5 stars
By Amanda on May 29, 2025

It works but

It works i just wish they were all ready made and you didn’t have to make it yourself but they work

It works i just wish they were all ready made and you didn’t have to make it yourself but they work


Rated 5 out of 5 stars
By May on Apr 11, 2025

Excellent price

Have 20 gal aquarium with 3 filters so go thru a lot of these Bio-Bags. Excellent quality and great price

Have 20 gal aquarium with 3 filters so go thru a lot of these Bio-Bags. Excellent quality and great price


Rated 5 out of 5 stars
By Mary on Jul 29, 2025

Quality product

Easy to assemble and cost efficient

Easy to assemble and cost efficient