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 135 GPH Internal Power Filter For Aquariums | For Fish Tanks Up To 30 Gallons, Whisper Quiet, 3-Stage Filtration, Space-Saving Internal Filter Clips on Tank

Product ID: 13425518

Details

Brand
Tetra
Color
Black
EU Spare Part Availability Duration
1 years
Global Trade Identification Number
Item Weight
1.5 pounds
Manufacturer
Tetra

💧135 GPH ultra-quiet motor

🖤space-saving internal clip design

🧼3-stage advanced filtration

14371 som

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Description

🐠 Silence meets power — keep your tank pristine without the noise!

SLEEK SPACE SMART - Mounts inside your tank for a flush, décor-friendly setup just 1 inch from the wall.
WHISPER QUIET POWER - Effortlessly filters up to 135 gallons per hour without disturbing your zen space.
TRIPLE ACTION CLEANSE - 3-stage filtration traps debris, eliminates odors, and keeps water crystal clear.
HASSLE FREE MAINTENANCE - Easy-change BioBag cartridges keep your aquatic environment pristine with minimal effort.
ADJUSTS TO YOUR AQUARIUM - Flexible clip system adapts to varying water levels for perfect performance every time.

The Tetra Whisper 135 GPH Internal Power Filter is designed for aquariums up to 30 gallons, delivering whisper-quiet operation with a powerful 135 gallons-per-hour motor. Featuring a 3-stage filtration system including cartridge floss and ultra-activated carbon, it effectively removes debris, odors, and discoloration. Its space-saving internal clip design allows tanks to be placed just 1 inch from walls, while adjustable mounting ensures optimal performance at various water levels. Ideal for professionals seeking a sleek, efficient, and low-maintenance filtration solution.

Specifications

ASIN	B0002DHYG8
Best Sellers Rank	#1,411 in Pet Supplies ( See Top 100 in Pet Supplies ) #2 in Aquarium Filters
Brand Name	Tetra
Color	Black
Customer Reviews	4.2 4.2 out of 5 stars (22,526)
EU Spare Part Availability Duration	1 years
Global Trade Identification Number	00046798258179
Included Components	Aquaria 75025817: Tetra Whisper 20I Internal Filter
Item Dimensions L x W x H	10.2"L x 4.9"W x 10.2"H
Item Type Name	Aquarium Filter
Item Weight	1.5 pounds
Manufacturer	Tetra
Manufacturer Part Number	AQ-65817
Manufacturer Warranty Description	See label
Material Type	100% Polyester
Model Number	25817
Number of Items	1
Number of Packs	1
Product Style	Submersible
Specific Uses For Product	Indoor
UPC	046798258179
Unit Count	1 Count

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14371 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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