---
product_id: 2116011
title: "Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12)"
brand: "tetra"
price: "€ 19.68"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/2116011-tetra-whisper-bio-bag-filter-cartridges-for-aquariums-unassembled-medium
store_origin: NL
region: Netherlands
---

# Carbon filter removes odors & discoloration Color-coded for easy size ID Dual-sided mesh traps debris Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12)

**Brand:** tetra
**Price:** € 19.68
**Availability:** ✅ In Stock

## Summary

> 🐠 Keep your aquarium whisper-quiet and crystal clear—because your fish deserve the best!

## Quick Answers

- **What is this?** Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12) by tetra
- **How much does it cost?** € 19.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/2116011-tetra-whisper-bio-bag-filter-cartridges-for-aquariums-unassembled-medium)

## Best For

- tetra enthusiasts

## Why This Product

- Trusted tetra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Maintenance:** Color-coded cartridges make replacements quick and foolproof—no guesswork needed.
- • **Dual-Sided Mesh Defense:** Dense mesh captures debris and fish waste, keeping your tank spotless.
- • **Monthly Refresh Routine:** Designed for easy monthly swaps to maintain optimal water quality and fish health.
- • **Crystal Clear Water, Always:** Advanced carbon filtration eliminates odors and discoloration for pristine aquariums.
- • **Universal Fit for Tetra Whisper:** Specifically engineered to fit Tetra Whisper filters, ensuring seamless compatibility.

## Overview

The Tetra Whisper Bio-Bag Filter Cartridges are medium-sized replacement carbon filters designed for freshwater and marine aquariums. Featuring dual-sided dense mesh, they effectively trap debris and fish waste while removing odors and discoloration. Color-coded for easy identification, these cartridges fit Tetra Whisper water filters and are simple to assemble and replace, recommended for monthly changes to maintain optimal water clarity and fish health.

## Description

Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12)

## Features

- UNASSEMBLED REPLACEMENT CARBON FILTER: Keeps aquarium water crystal clear – removes odors and discoloration.
- CATCHES DEBRIS: Dense, dual-sided mesh filters debris and fish waste.
- FITS TETRA WHISPER WATER FILTERS: Color coded to make it simple to remember which replacement cartridge size to purchase.
- CONVENIENT: Easy to assemble and easy to replace.
- USAGE: Change monthly or sooner if needed.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 6.4 ounces |
| Liquid Volume | 5 Liters |
| Target Species | Fish |
| Item Form | Filter Part |
| Allergen Information | Gluten Free |

## Product Details

- **Brand:** Tetra
- **Liquid Volume:** 5 Liters
- **Item Weight:** 0.4 Pounds
- **Item Form:** Filter Part
- **Manufacturer:** Tetra

## Images

![Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12) - Image 1](https://m.media-amazon.com/images/I/81UZyoZv11L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: does anyone have the exact measurements for the X large + Medium filters?  Thanks**
A: Must be a secret - I sure don't understand why the seller doesn't clearly list the size.Whisper Bio-Bag Filters are slightly tapered in the drawing. Width dimensions are at the top.Large: 4.6 wide x 6.4 tallMedium/"Junior":  3.0 wide x 5.2 tallSmall: 2.1 wide x 3.8 tallFound dimensions on the Tetra website but not sure the link address will work here. Here is the PDF file link:http://cdn.spectrumbrands.com/~/media/UPG/Tetra/Aquarium/Equipment/Replacement%20Filter%20Cartridges/WhisperCartridges.ashxIf this doesn't work go to their website at: www.tetra-fish.com and search for "Tetra Whisper Unassembled Bio-Bag Filter Cartridges"

**Q: Does it fit topfin power filter 10?**
A: I bought these about a month ago for my top fin 10 filter.  The cartridge in my top fin 10 is angled inward at the bottom whereas this filter cartridge is more of a rectangular shape.  Due to the shape it does not fit the top fin 10 slot.  However I kept my old cartridge frame and I'm using this product, everything works great.

**Q: What is the difference between the 26164 and  ATS26164? Both seem to be 12 large Whisper filter cartridges.**
A: Hi, I use the Medium size whisper filter cartridges...the difference between the 26164 & ATS26164 could be the fact that one is a pre-assembled cartridge and the other is not.  I buy the 12 pack of unassembled filters which are quite a bit cheaper and are the identical product.  It comes with the white filters, one plastic insert, and small charcoal bags that take a few minutes to assemble.  Hope this helps.

**Q: medium size it's for 10 galons?**
A: Hi Oscar, the medium size fits the Whisper PF10 and the Whisper 20 Power Filters.

## Frequently Bought Together

- Tetra Whisper Bio-Bag Filter Cartridges for Aquariums, Medium Filter for Freshwater and Marine Fish, Removes Odors and Discoloration, Easy to Assemble, 12 Large Green Filters
- Tetra Water Cleaner Gravel Siphon for Aquariums, Easily Clean Freshwater Aquariums

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-16*