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.

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Tetra Whisper 85 GPH Internal Power Filter For Aquariums

Product ID: 3955183

Details

Brand
Tetra
Color
Black
Global Trade Identification Number
Item Weight
1.1 pounds
Material
ABS PP
Maximum Flow Rate
1.33 gpm

⚡85 GPH powerful motor

📏Space-saving 1-inch wall clearance

🔇Whisper-quiet operation

€ 57.61

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Description

🐠 Quiet power that keeps your aquatic world flawless and your space sleek.

WHISPER QUIET ZEN MODE - Maintain a peaceful workspace or home with near-silent operation that won’t disrupt your flow.
TRIPLE STAGE CLEAN TECH - Mechanical, chemical, and biological filtration combine to keep water crystal clear and fish thriving.
COMPACT DISCREET DESIGN - Clips inside your tank and tucks away behind décor, letting your aquarium shine without bulky equipment.
EFFORTLESS 85 GPH FILTRATION - Power through impurities with a motor that refreshes your aquarium water up to 85 gallons per hour.
CUSTOMIZABLE FIT FOR ANY SETUP - Adjustable clip adapts to various water levels and tank configurations for seamless integration.

The Tetra Whisper 85 GPH Internal Power Filter is a premium, USA-made filtration system designed for 5- to 10-gallon aquariums. Featuring a powerful yet whisper-quiet motor, it delivers efficient triple-stage filtration—mechanical, chemical, and biological—using advanced Bio-Bag cartridges with Stay Clean™ technology. Its space-saving design clips inside the tank, allowing aquariums to be placed just one inch from the wall, while an adjustable clip ensures easy setup for various water levels. Ideal for millennial professionals seeking a sleek, low-maintenance solution to maintain a pristine aquatic environment.

Specifications

ASIN	B0002DHYF4
Best Sellers Rank	#1,767 in Pet Supplies ( See Top 100 in Pet Supplies ) #3 in Aquarium Filters
Brand Name	Tetra
Color	Black
Customer Reviews	4.2 4.2 out of 5 stars (22,620)
Flow Rate	1.33 gpm
Global Trade Identification Number	00046798258162
Included Components	Tetra Whisper Internal Power Filter 5 To 10 Gallons, For aquariums, In-Tank Filtration With water pump , Black
Item Dimensions L x W x H	4.25"L x 3.92"W x 7.87"H
Item Highlight	For Fish Tanks Up To 10 Gallons, Whisper Quiet, Space-Saving Internal Filter Clips on Tank
Item Type Name	Tetra Whisper Internal Filter
Item Weight	1.1 pounds
Manufacturer	Tetra
Manufacturer Part Number	AQ-65816
Manufacturer Warranty Description	2-Year Limited Warranty
Material Type	ABS, PP
Model Number	AQ-65816
Number of Items	1
Power Source	Corded Electric
Product Style	In-Tank
Specific Uses For Product	Active
UPC	046798258162
Unit Count	1 Count
Voltage	120 volts

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€ 57.61

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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