Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons
Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons
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Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons

292 ratings

Key item features

  • FOR 1-4 GALLON AQUARIUMS: Tetra Whisper 4i Internal Power Filter uses Small Whisper BioBag filter cartridges that are easy to change.
  • 27 GPH MOTOR: The internal 27 GPH pump cycles a 4 gallon aquarium more than 6 times per hour.
  • POWERFUL FILTRATION: Water flows through the cartridge floss, trapping debris and fish waste, while Ultra-activated carbon helps remove odor and discoloration.
  • SPACE-SAVING DESIGN: Filter is easily hidden by décor and allows aquariums to be positioned as close as 1 inch from the wall.

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Customer ratings & reviews

3.8 out of 5 stars
stars
292 ratings110 reviews
How item rating is calculated
  1. 5 stars59% (172)
  2. 4 stars9% (26)
  3. 3 stars8% (22)
  4. 2 stars5% (14)
  5. 1 star20% (58)

Reviews summary

Pros

  • : Offers good value for small aquariums and multiple tank use.
  • : Fits over small aquariums with internal filters.
  • : Suitable for small tanks, such as 2-3 gallons.
  • : Works well in tanks up to 10 gallons in size.

Cons

  • : The filter emits sounds sporadically and one unit failed.
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Showing 1-3 of 110 reviews

Oct 11, 2026
Reviewer name: MeganA
Item details
Size descriptor: Small
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worth a few extra bucks

I definitely do not have to change my goldfish water as often with this filter! Definitely worth the extra $5! Maybe I change the water once a month?

Helpful?4YV6RURQXD1W244798591
Sep 10, 2026
Reviewer name: Carol
Item details
Size descriptor: Small
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

i ordered the wrong size

Helpful?4YV6RURQXD1W244798591
Jun 8, 2026
Reviewer name: Thomas
Top Reviewer
Item details
Size descriptor: Small
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

Great find

For the price a really good buy as it will work in 2 of my fish tanks Very pleased with it so far.

Helpful?4YV6RURQXD1W244798591
Current price is $12.87
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