---
product_id: 633712280
title: "Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816)"
brand: "tetra"
price: "€ 11.44"
currency: EUR
in_stock: false
url: https://www.desertcart.sk/products/633712280-whisper-in-tank-filter-10i-with-bioscrubber-for-3-10
store_origin: SK
region: Slovakia
---

# 80 GPH powerful flow Easy-change Bio-Bag cartridge Dual-sided dense mesh Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816)

**Brand:** tetra
**Price:** € 11.44
**Availability:** ❌ Out of Stock

## Summary

> 🐠 Keep it clean, keep it quiet — your fish’s new best friend!

## Quick Answers

- **What is this?** Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816) by tetra
- **How much does it cost?** € 11.44 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/633712280-whisper-in-tank-filter-10i-with-bioscrubber-for-3-10)

## 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

- • **BioScrubber Boost:** Integrated Bio-Bag cartridge promotes healthy bacteria growth for natural water purification.
- • **Space-Savvy Setup:** Mounts inside the tank with included clip, allowing your aquarium to sit flush against any wall without bulky attachments.
- • **Effortless Maintenance:** Medium-sized, easy-to-replace filter cartridges make upkeep quick, so you spend more time enjoying your aquatic display.
- • **Whisper-Quiet Efficiency:** Internal filter with air-driven design ensures silent, powerful water circulation up to 80 gallons per hour.
- • **Dual-Sided Debris Defense:** Dense mesh captures fish waste and debris from all angles, keeping your aquarium crystal clear.

## Overview

The Tetra Whisper In-Tank Filter 10i combines a silent air-driven pump with a dual-sided mesh filter and BioScrubber cartridge, delivering up to 80 GPH filtration and oxygenation for 3-10 gallon aquariums. Its compact internal design mounts inside the tank, enabling space-saving placement and easy cartridge changes for hassle-free maintenance.

## Description

The Tetra® Whisper® 10i Internal Filter for aquariums is the ultimate in quiet, convenient 3-stage filtration. This submersible filter mounts on the inside of the aquarium, rather than hanging from the outside, making it possible to place the tank flush against a wall and easily hide with tank décor. The air pump (included) provides bubbles that move water through the filter, efficiently filtering and oxygenating your aquarium. The water flows through Ultra-Activated® carbon, absorbing odors and discoloration, as well as through the dual-sided mesh of the Bio-Bag® Filter, trapping debris and fish waste. Filters up to 80 GPH while oxygenating water. The Tetra Whisper 10i Internal Filter adjusts easily to high or low water levels with a mounting clip. Each unit includes the filter, air pump, 2 feet of airline tubing and one medium Tetra Whisper Bio-Bag Filter cartridge (change monthly – replacement filter cartridges available). For 3-10 gallon tanks. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand 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.

## Features

- UNIVERSAL DESIGN Tetra Whisper 10i Internal Filter is an all-in-one air pump and water filter system
- INTERNAL FILTER Mounts on the inside of your aquarium with clip (included)
- CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste
- AERATES WATER Air-driven design filters up to 80 GPH while oxygenating water
- CONVENIENT DESIGN Uses medium easy to change Bio-Bag cartridges filter mounts inside aquarium making it possible to place tank flush against the wall

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Department | Unisex-Adult |
| Manufacturer | Tetra |
| Item model number | 25816 |
| Product Dimensions | 10.8 x 10.16 x 20.32 cm; 476.27 g |
| ASIN | B0002DHYF4 |

## Images

![Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816) - Image 1](https://m.media-amazon.com/images/I/81FNp7mBSUL.jpg)
![Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816) - Image 2](https://m.media-amazon.com/images/I/71nWTeL0jdL.jpg)
![Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816) - Image 3](https://m.media-amazon.com/images/I/71L+A522lJL.jpg)
![Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816) - Image 4](https://m.media-amazon.com/images/I/81+mKjBswvL.jpg)
![Whisper In-Tank Filter 10i with BioScrubber for 3 - 10 gallon aquariums (25816) - Image 5](https://m.media-amazon.com/images/I/81FyQkSAO-L.jpg)

## Questions & Answers

**Q: What size replacement filter cartridge for this unit...small, med?**
A: The Tetra Bio-Bag Large (formerly known as Regular) are the exact same as the filter bag supplied with the Tetra Whisper In-Tank filter 20i. I got both from Amazon: filter $11.89; 12 cartridges $12.28. These filters last a long time, can be cleaned and reused. For my purpose, this filter has been great.

**Q: Where can I just get the Bioscrubber?**
A: Hello. You can get it at a pet store, amazon has some, grocery stores with a pet section...they are pretty easy to find.

**Q: Would a small fish get sucked up in this filter? I have a 2 month old beta who is just recently getting color fins but still very small**
A: Yes. I had 4 neon tetras and all 4 ended up getting sucked into the filter and the spinning fan mechanism blended them into multiple pieces. It happened the first night, I woke up and 4 fish were missing. I found them in the filter :(

**Q: Would this filter be too strong for a Betta in a 10 gallon tank?**
A: Yes, it would be fine.  It is rated at 90 GPH which is the appropriate flow rate for a 10 gallon tank.  Bettas are not the strongest swimmers, it is true, but typically handle filtration fine, as long as it is placed at one end of the tank so they have room to move away if necessary. They eventually adapt and will often play in the flowing water.  Initially, you might want to place tall plants or tall décor in front of it to break up the flow until the betta becomes accustomed to it.  For additional assistance, please call the Tetra Consumer Relations Team at 1-800-526-0650.

## Frequently Bought Together

- Tetra Whisper Internal Power Filter 5 To 10 Gallons, For aquariums, In-Tank Filtration With Air Pump, Black
- Tetra Whisper Bio-Bag Filter Aquarium Cartridges, Medium Filter for Freshwater and Marine Fish, Removes Odors and Discoloration, Ready to Use, 3 Medium Green Filters
- Tetra Water Cleaner Gravel Siphon for Aquariums, Easily Clean Freshwater Aquariums

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**Shop now:** [https://www.desertcart.sk/products/633712280-whisper-in-tank-filter-10i-with-bioscrubber-for-3-10](https://www.desertcart.sk/products/633712280-whisper-in-tank-filter-10i-with-bioscrubber-for-3-10)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-24*