What size replacement filter cartridge for this unit...small, med?

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.

Where can I just get the Bioscrubber?

Hello. You can get it at a pet store, amazon has some, grocery stores with a pet section...they are pretty easy to find.

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

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 :(

Would this filter be too strong for a Betta in a 10 gallon tank?

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.

Tetra Whisper Internal Filter 10 To 20 Gallons For Aquariums

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R3132

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Silence meets power: Filter smarter, not louder.

WHISPER QUIET POWER - Experience powerful 135 GPH filtration without the noise—your aquatic oasis stays serene.
ALL IN ONE CONVENIENCE - Internal filter with built-in air pump keeps your aquarium fresh and vibrant without external clutter.
SLEEK SPACE SMART SETUP - Mount your tank flush against the wall with a discreet internal filter that blends seamlessly with your décor.
ADVANCED BIO BAG FILTRATION - Trap debris and eliminate odors with easy-to-change, ultra-activated carbon cartridges for crystal-clear water.
EFFORTLESS WATER LEVEL ADJUSTMENT - Flexible clip design adapts to any tank height, ensuring optimal filtration whether water is high or low.

The Tetra Whisper Internal Filter is a submersible, air-powered filtration system designed for 10- to 30-gallon aquariums. It delivers a quiet yet powerful 135 gallons per hour flow rate through easy-to-replace Whisper BioBag cartridges that trap debris and remove odors. Its space-saving internal design allows tanks to sit just 1 inch from walls, while adjustable mounting clips accommodate varying water levels, making it ideal for sleek, low-profile aquarium setups.

Specifications

ASIN	B0002DHYG8
Brand	Tetra
Brand Name	Tetra
Colour	Blacks & Grays
Country of Publication	USA
Customer Reviews	4.4 out of 5 stars 5,085 Reviews
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	00046798258179
Included Components	Tetra Whisper Internal Filter 10 To 30 Gallons, For aquariums, In-Tank Filtration With Air Pump
Item Dimensions L x W x H	25.9L x 12.4W x 25.9H Centimeters
Item Type Name	Tetra Whisper Internal Filter
Item Weight	658 g
Manufacturer	Tetra
Manufacturer Part Number	AQ-65817
Material	100% Polyester
Material Type	100% Polyester
Model Number	25817
Number of Items	1
Number of Packs	1
Power Source	Air Powered
Product Dimensions	25.9L x 12.4W x 25.9H Centimeters
Product Style	Submersible
Specific Uses For Product	Active
Style	Submersible
UPC	046798258179
Unit Count	1.0 Count

Reviews

V**.

Pump burned

Worst pump ever within 20 mins of usage it burned and stopped working

20.01.2019

R**X

Great buy

Works great, no noise and tank is cleaner.

22.02.2026

A**L

110 V elektriğiniz yoksa almayın

110 V için üretilmiş ürün, 220 V ile sesli çalışıyor ve sonrasında yanarak kullanılmaz hâle geliyor.

27.01.2026

M**N

Terrible filter broke down in 15mins

Started with too much of noise and broke down in 15mins

27.03.2023

R**Z

Muy bueno

El mejor filtro, buen precio, no hace ruido, mantiene el agua cristalina, no arrastra a los peces a su interior.

2.06.2017

B**E

Very bad experience

Motor is not woking properly, very big broken sounds is coming out from the motor, request amazon to refund, very sad.

23.08.2024

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R3132

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Very reliable shop with genuine products. Will definitely buy again!

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