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 Internal Filter 10 To 30 Gallons, For aquariums, In-Tank Filtration With Air Pump

Product ID: 334449360

Details

Brand
Tetra
Colour
Blacks & Grays
Material
100% Polyester
Product dimensions
25.9L x 12.4W
Style
Up to

💨125 GPH air-driven flow

🔇Ultra-quiet in-tank motor

🧹Dual-sided dense mesh filter

¥12626

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Description

🐠 Elevate your aquarium game with whisper-quiet, powerhouse filtration!

ADJUSTABLE FOR ANY TANK - Flexible suction cup and bracket mounting adapts to varying water levels, ideal for turtles or waterfall effects.
WHISPER QUIET OPERATION - Submerged motor design ensures near-silent filtration—no more noisy distractions during your zen moments.
SPACE SAVVY IN TANK MOUNT - Mounts flush inside your aquarium, allowing seamless placement against walls—perfect for sleek, modern setups.
POWERFUL 125 GPH FILTRATION - Effortlessly circulates and oxygenates water up to 30 gallons, keeping your aquatic ecosystem vibrant and healthy.
DUAL SIDED BIO BAG CARTRIDGE - Dense mesh traps debris and fish waste efficiently, simplifying maintenance with easy cartridge swaps.

The Tetra Whisper Internal Filter combines a quiet, air-driven motor with a dual-sided mesh Bio-Bag cartridge to deliver efficient filtration and aeration for aquariums from 10 to 30 gallons. Its in-tank mounting design saves space and allows tanks to sit flush against walls, while adjustable fittings accommodate different water levels. Perfect for millennial professionals seeking a sleek, low-maintenance aquatic environment.

Specifications

ASIN	B0002DHYG8
Best Sellers Rank	#21,023 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,187 in Aquarium Accessories
Brand Name	Tetra
Color	Blacks & Grays
Customer Reviews	4.2 4.2 out of 5 stars (21,617)
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 Type	100% Polyester
Model Number	25817
Number of Items	1
Number of Packs	1
Power Source	Manual (Air Pump)
Product Style	Up to 20-Gallons
Specific Uses For Product	Active
UPC	046798258179
Unit Count	1 Count

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¥12626

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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4 days ago

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