Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons
Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons
Hero image 0 of Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons, 0 of 9
200+ bought in past month, try a subscription
Visit the Tetra Store

Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons

281 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 dĂ©cor and allows aquariums to be positioned as close as 1 inch from the wall.

About this item

Product details

Specifications

Directions

Warranty

Refine your search

Customer ratings & reviews

3.8 out of 5 stars
stars
281 ratings106 reviews
How item rating is calculated
  1. 5 stars59% (165)
  2. 4 stars9% (24)
  3. 3 stars8% (22)
  4. 2 stars5% (14)
  5. 1 star20% (56)

Reviews summary

Pros

  • : Offers good value for small aquariums and multiple tank use.
  • : Works well in tanks up to 10 gallons in size.
  • : Fits over small aquariums with internal filters.
Generated by AI
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 106 reviews

Dec 21, 2025
Reviewer name: charley
Item details
Size descriptor: Small
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

it's just perfect for a small little tank. read some stories about pumps killing fish that get trapped on intake holes but my fish has been just fine for about a month now. the intake suction is small and on bottom as well.

Helpful?4YV6RURQXD1W244798591
Sep 22, 2025
Reviewer name: FreshasaDaisy
Item details
Size descriptor: Small
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

This fabulous filter, comes with one filter cartridge. Water flows beautifully in a small tank, mine was a three gallon. keeps water clear. Very nice ,not bulky, thin ,fits nicely over the back of aquarium with the main filter internal.plug in cord is a nice length . Great for a fish tank. i have guppies , a catfish and a large snail.ThanksTetra Wisper, price was very good as well.

Helpful?4YV6RURQXD1W244798591
Jul 18, 2026
Reviewer name: Janai
Item details
Size descriptor: Small
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Always reliable.

Helpful?4YV6RURQXD1W244798591
Current price is $12.87
Price when purchased online
  • Free 90-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $12.87
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $12.87

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Today
.
Order within 11 hr 32 min
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible

More seller options (1)

Starting from $19.44
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.