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Tetra Whisper Internal Power Filters
Tetra Whisper Internal Power Filters
Tetra Whisper Internal Power Filter 3i
For Aquariums up to 3 gallons; 20 GPH; Model 3i
The Strong Silent Type
  • Full one-year warranty.
  • Includes filter, air pump, filter cartridge and 2 ft. of airline tubing.
  • Same quality and performance of an external power filter.
  • Air-driven design filters up to 20 GPH while oxygenating water.
  • Keeps water crystal clear.
  • Adjusts easily to high or low water levels with mounting suction cups.

Two Filters in One

Mechanical Filter
The Bio-Bag uses dual-sided mesh to catch debris and waste.

Chemical FilterUltra-activated carbon removes odors and discoloration.

It’s What’s Inside That Counts.
The air pump provides bubbles that move water through the filter, efficiently filtering and oxygenating your aquarium.

  • Air flows from pump through airline tubing.
  • Air bubbles carry water up to intake tube.
  • Water flows through Ultra-activated carbon absorbing odors and discoloration.
  • Water flows through cartridge floss, trapping debris and waste.


Tetra Whisper Internal Power Filter 10i
For 2-10 gallons Aquariums; 90 GPH; Model 10i

It's What's Inside That Counts
The virtually silent submerged motor gives you power filter performance inside your aquarium.

  1. Filter pulls water from the tank and pushes it up through the filter cartridge.
  2. Dense mesh catches debris and waste.
  3. Ultra-activated carbon absorbs odors and discoloration.
  4. Bio-foam cultivates aerobic bacteria, which eliminates toxic ammonia and nitrites before water cascades back into aquarium.

As Versatile As It Is Powerful
The Whisper In-tank Filter works in as little as two inches of water, making it ideal for low water level environments like viquariums for turtles, newts, or frogs.

Working Hard Behind the Scenes
Install the Whisper In-tank Filter on the back wall of your tank. Unlike conventional filters, its small size makes it easy to hide with a plant or other decorative object. From the front, it's practically invisible.

The Strong Silent Type

  • Full two year warranty.
  • Same quality and performance of an external power filter.
  • Designed to be discrete for a clear view of your aquarium.
  • Space saving--aquarium can be flush to wall.
  • Powerful submerged motor has hardly any sound.
  • Clean, clear water from efficient three-stage filtration.

Three Filters in One
The Whisper In-tank Filter adjust easily to high or low water levels with mounting suction cups and/or brackets.

  • Mechanical Filter
    The Bio-Bag uses dual-sided mesh to catch debris and waste.

  • Chemical Filter
    Ultra-activated carbon removes odors and discoloration better than competing cartridges.

  • Biological Filter
    Bio-foam creates a large, three-dimensional site for cultivating aerobic bacteria, which eliminates toxic ammonia and nitrites.

Please Note: 3i is air pump driven and 10i, 20i, & 40i are impeller driven.


Tetra Whisper Internal Power Filter 20i
For 10-20 gallon Aquariums; 125 GPH; Model 20i
The Strong Silent Type.
  • Full two year warranty
  • Same quality and performance of an external power filter
  • Designed to be discrete for a clear view of your aquarium
  • Space saving-aquarium can be flush to wall
  • Powerful 125 GPH submerged motor has hardly any sound
  • Clean, clear water from efficient 3-stage filtration.

Three Filters in One. The Whisper in-tank filter adjusts easily to high or low water levels with mounting suction cups and/or bracket.
  • Mechanical Filter. The Bio-Bag uses dual-sided mesh to catch debris and waste.
  • Chemical Filter. Ultra-activated carbon removes odors and discoloration better than competing cartridges
  • Biological Filter. Bio-foam creats a large, three-dimensional site for cultivating aerobic bacteria, which eliminates toxic ammonia and nitrites.

It's what's inside that counts. The virtually silent submerged motor gives you power filter performance inside your aquarium. 1. Filter pulls water from the tank and pushes it up through the filter cartridge. 2. Dense mesh catches debris and waste. 3. Ultra-activated carbon absorbs odors and discoloration. 4. Bio-foam cultivates aerobic bacteria, which eliminiate toxic ammonia and nitrites before water cascades back into aquarium.
As versatile as it is powerful. The whisper in-tank filter works in as little as 2 inches of water, making it ideal for low water level environments like viquariums for turtles, newts or frogs.
Working hard behind the scenes. Install the whisper in-tank filter on the back wall of your tank. Unlike conventional filters, its small size makes it easy to hide with a plant or other decorative object. From the front, it's practically invisible.


Tetra Whisper Internal Power Filter 40i
For 20-40 gallon Aquariums; 170 GPH; Model 40i

It's What's Inside That Counts
The virtually silent submerged motor gives you power filter performance inside your aquarium.

  1. Filter pulls water from the tank and pushes it up through the filter cartridge.
  2. Dense mesh catches debris and waste.
  3. Ultra-activated carbon absorbs odors and discoloration.
  4. Bio-foam cultivates aerobic bacteria, which eliminates toxic ammonia and nitrites before water cascades back into aquarium.

As Versatile As It Is Powerful
The Whisper In-tank Filter works in as little as two inches of water, making it ideal for low water level environments like viquariums for turtles, newts, or frogs.

Working Hard Behind the Scenes
Install the Whisper In-tank Filter on the back wall of your tank. Unlike conventional filters, its small size makes it easy to hide with a plant or other decorative object. From the front, it's practically invisible.

The Strong Silent Type

  • Full two year warranty.
  • Same quality and performance of an external power filter.
  • Designed to be discrete for a clear view of your aquarium.
  • Space saving--aquarium can be flush to wall.
  • Powerful submerged motor has hardly any sound.
  • Clean, clear water from efficient three-stage filtration.

Three Filters in One
The Whisper In-tank Filter adjust easily to high or low water levels with mounting suction cups and/or brackets.

  • Mechanical Filter
    The Bio-Bag uses dual-sided mesh to catch debris and waste.

  • Chemical Filter
    Ultra-activated carbon removes odors and discoloration better than competing cartridges.

  • Biological Filter
    Bio-foam creates a large, three-dimensional site for cultivating aerobic bacteria, which eliminates toxic ammonia and nitrites.

Please Note: 3i is air pump driven and 10i, 20i, & 40i are impeller driven.


Tetra Whisper Internal Power Filters

Internet Price: $12.99 - $29.99   Today's Price: $10.99 - $24.99  (Save up to 17%)

Shop All Products By Tetra

  • Quiet power filtration fits discreetly inside your tank, working in as little as two inches of water
  • Combines mechanical, biological, and chemical filtration to deliver crystal clear water

Shipping Usually Leaves Warehouse the Next Business Day


Store Prices Vary

For Aquariums up to 3 gallons
20 GPH
Model 3i
SKU: 376809

Tetra Whisper Internal Power Filter 3i
$12.99 $10.99
Qty:

For 2-10 gallons Aquariums
90 GPH
Model 10i
SKU: 933724

Tetra Whisper Internal Power Filter 10i
$14.99 $12.99
Qty:

For 10-20 gallon Aquariums
125 GPH
Model 20i
SKU: 933732

Tetra Whisper Internal Power Filter 20i
$24.99 $20.99
Qty:

For 20-40 gallon Aquariums
170 GPH
Model 40i
SKU: 933740

Tetra Whisper Internal Power Filter 40i
$29.99 $24.99
Qty:

Store Prices Vary

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ACCESSORIES
Tetra Whisper Internal Power Filter 3i
Tetra Whisper Bio-Bag Disposable Filter Cartridges
Tetra Whisper Bio-Bag Disposable Filter...
Tetra Whisper Bio-Bag Disposable Filter...
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