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Tetra Whisper Internal Filter 3 to 10 Gallons, for Aquariums, in-Tank Filtration with Air Pump, Blacks & Grays (25816)

4.4 out of 5 stars 5,746 ratings
Amazon's Choice recommends highly rated and well-priced products.
Amazon's Choice for "10 gallon fish tank filter"

Price: $9.34 & FREE Returns
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Up to 30-Gallons
  • UNIVERSAL DESIGN Tetra Whisper 20i 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 125 GPH while oxygenating water
  • CONVENIENT DESIGN Uses large easy to change Bio-Bag cartridges filter mounts inside aquarium making it possible to place tank flush against the wall
New (6) from $8.84 & FREE Shipping on orders over $25.00

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Frequently bought together

  • Tetra Whisper Internal Filter 3 to 10 Gallons, for Aquariums, in-Tank Filtration with Air Pump, Blacks & Grays (25816)
  • +
  • Fluker's Buffet Blend Aquatic Turtle Food , 7.5-Ounce
  • +
  • TetraFauna AquaSafe Water Conditioner for Reptiles & Amphibians 3.38oz (75077009)
Total price: $17.07
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From the manufacturer

Product description

Size:Up to 30-Gallons

For the ultimate in convenience and quiet, choose a Whisper In-Tank Filter. These filters mount on the inside of the aquarium, rather than hanging from the outside -- making it possible to place the tank flush against a wall. In-Tank Filters are unusually quiet, since the motor is under the water. Offering the same quality and performance as an external filter, the Whisper In-Tank Filter will function in as little as 2 inches of water -- making it ideal for turtle tanks, or for creating a waterfall inside the tank.The Whisper In-Tank filter features adjusts easily to high or low water levels with mounting suction cups and/or bracket. Each filter comes with one pre-assembled Whisper Bio-Bag filter cartridge.


Product details

Size:Up to 30-Gallons
  • User Guide [PDF ]
  • Is Discontinued By Manufacturer : No
  • Product Dimensions : 4.88 x 5.38 x 10.19 inches; 1.32 Pounds
  • Item model number : 25817
  • Date First Available : July 15, 2004
  • Manufacturer : Tetra
  • ASIN : B0002DHYG8
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • Customer Reviews:
    4.4 out of 5 stars 5,746 ratings

Important information

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Compare with similar items


Tetra Whisper Internal Filter 3 to 10 Gallons, for Aquariums, in-Tank Filtration with Air Pump, Blacks & Grays (25816)
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Aqueon Quietflow E Internal Power Filter
MarineLand Penguin 100 GPH BIO-Wheel Power Filter
Aqua Clear - Fish Tank Filter
Customer Rating 4.4 out of 5 stars (5746) 4.1 out of 5 stars (2112) 4.0 out of 5 stars (2716) 4.1 out of 5 stars (1767) 4.4 out of 5 stars (9625)
Price $9.34 $7.55 $13.99 $10.53 $25.99
Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com
Item Dimensions 4.88 x 5.38 x 10.19 inches 4.25 x 6.00 x 7.06 inches 2.25 x 4.50 x 6.50 inches 5.50 x 5.50 x 8.00 inches 4.50 x 7.00 x 6.50 inches

Customer Questions & Answers

Customer reviews

4.4 out of 5 stars
4.4 out of 5
5,746 global ratings
How are ratings calculated?

Top reviews from the United States

Reviewed in the United States on December 28, 2018
Size: Up to 4-GallonsVerified Purchase
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326 people found this helpful
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Reviewed in the United States on June 3, 2019
Size: Up to 4-GallonsVerified Purchase
118 people found this helpful
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Reviewed in the United States on September 26, 2018
Size: Up to 40-GallonsVerified Purchase
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112 people found this helpful
Comment Report abuse
Reviewed in the United States on September 17, 2017
Size: Up to 10-GallonsVerified Purchase
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153 people found this helpful
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Reviewed in the United States on March 10, 2016
Verified Purchase
72 people found this helpful
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Top reviews from other countries

michael mcgrath
1.0 out of 5 stars One Star
Reviewed in the United Kingdom on November 26, 2017
Size: Up to 30-GallonsVerified Purchase
Kia
5.0 out of 5 stars Súper filtro!
Reviewed in Mexico on September 8, 2019
Size: Up to 10-GallonsVerified Purchase
review imagereview image
One person found this helpful
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Sol Larenas
1.0 out of 5 stars No sirve
Reviewed in Mexico on June 21, 2019
Size: Up to 4-GallonsVerified Purchase
One person found this helpful
Report abuse
Nigel M Burnett
1.0 out of 5 stars The description is wrong! It has to hang over the edge. No suction cups like they used to have.
Reviewed in Canada on June 9, 2020
Size: Up to 10-GallonsVerified Purchase
Alanna Elia
3.0 out of 5 stars Very large and bulky, not to mention quite noisy.
Reviewed in Canada on April 24, 2020
Size: Up to 30-GallonsVerified Purchase
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