Whisper^® Internal Power Filter

Product No. 25846

Whisper® Internal Power Filter is rated 2.4 out of 5 by 18.

The Tetra Whisper internal aquarium filter is the ultimate in quiet, convenient 3-stage filtration. The dual-sided mesh of the Bio-Bag® catches debris and fish waste while the activated carbon absorbs odors and discoloration. Biological filtration is provided by the Bio-Scrubber. Bio-Scrubber's anti-clog design provides complete biological filtration with the convenience of less maintenance. Because the Bio-Scrubber has a solid back, water is forced to flow evenly over the bacteria-rich bristles. The filter is submersible.

NOTE: The filter now comes with a clip to hold the filter. If suction cups are needed please contact Consumer Services at 1-800-322-1266.

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Sizes Available

This product comes in the following sizes:
Whisper 3i - 20 GPH
Whisper 10i - 80 GPH
Whisper 20i - 125 GPH
Whisper 40i - 170 GPH

Instructions

Whisper Internal Power Filter 3i

Whisper Internal Power Filter 10i 20i 40i

Product Reviews
Question & Answer

Rated 1 out of 5 by tadnkc from 3i not flowing water in less than a month Bought a glo-fish cube aquarium from Tetra and it came with the 3i bubler filter. It worked fine for 29 days and quit flowing water. Replaced the filter and still no flow through the filter. Bubling is functioning just fine but now without filtration, the water is beginning to become cloudy.

Date published: 2018-10-22

Rated 5 out of 5 by Abes turtles from So far the Whisper 40i has been perfect I bought several of these for my smaller turtle tanks. Wrapping the bottom with polyester media prolongs need to clean filter and protects the impeller from clogging. I recommend this particularly for Turtle tanks 20 gallon or less.

Date published: 2018-10-17

Rated 2 out of 5 by lydzo from WHISPER FILTER Just installed the whisper 3 and not impressed. It doesn't fit right in my tank I can not put the lid on, the motor has to be higher than the water level and the plug in has to hang ???. It just spits out water from the spout but the clear bubble part is going strong. Its not designed for my tank and I will find a more suitable one then return this one.

Date published: 2018-10-06

Rated 1 out of 5 by OneDelta from Why does it have holes and no suction cups? Filter is quiet and would work great, but it comes with no sucktion cups and has holes in the back!? The water leaks out the back and this doesn't work with my tank setup (clip doesn't fit on my tank style).

Date published: 2018-09-26

Rated 1 out of 5 by ebie from Extremely Annoyed I recently purchased this filter. The box said it came with suction cups as well as the clip. Upon opening the box I realized only the clip came with the filter. I am unable to use the clip since my aquarium has a lip on the top. I contacted customer service and they basically said “too bad” buy suction cups from our website. There is no way I am paying 4.20$ for suction cups and 13$ in shipping.

Date published: 2018-09-26

Rated 5 out of 5 by JayElleBee from Great until it's not Purchased two filters for my tanks. The large filter is going strong, but the smaller one just pooped out this week. It was running great, quietly, and reliably for less than a month before it simply stopped. I am super bummed about it, because I quite like the filter for its aesthetics and functionality! Had it not quit, then it would get a solid FINE STARS without hesitation. I suppose this is simply a "buyer beware" tale. They are wonderful while operational, but that period of time might be limited. [saddest face]

Date published: 2018-08-14

Rated 1 out of 5 by Megg116 from Terrible filter The suction on this filter is by far the worst i have ever seen. Even after two week of having it I have lost two whole tanks of fish thanks to this product. The water is constantly cloudy and/or slightly brown. That is even after a partial water changes or even total tank cleaning and filter cartage change. I even changed fish food brands to see if that would help, but sadly no. I Will not be buying this product again.

Date published: 2018-08-02

Rated 1 out of 5 by jack28 from Very noisy I bought this a few days ago and already don’t like it. The air pump isn’t very nosy. The clip doesn’t fit on the tank so I had to tape it up. The filter has to be at an exact angle for the filter to so somewhat quiet. I also have a larger tank with a Top Fin filter and it barely makes a noise.

Date published: 2018-07-11

Whisper® Internal Power Filter Reviews - page 2

For the 10i filter how many time an hour does it filter a 10 gal tank??

Asked by: Tiff9

The flow rate is 90 gph, so 9 times per hour. BREX

Answered by: BREX

Date published: 2018-12-06

I bought the Tetra Floating Starter Kit and the filtration has worked fine, but yesterday it was barely flowing. Today it is flowing so hard I can see the plants moving in the water and my fish has been hiding all day. What can I do?

Asked by: AJ811

That filter does not have a flow control, but you can insert a flow control valve in line about 8 inches from the air pump to help reduce the flow. When the flow is slow, clean out the hole in the bottom of the filter body and replace the cartridge. BREX

Answered by: BREX

Date published: 2018-11-01

Where can I purchase the replacement filters?

Asked by: docquiri

Thank you for asking! The replacement cartridges are available at most stores that sell fish products as well as online. For more help contact Tetra at 1-800-526-0650.

Answered by: Tetra Expert

Date published: 2018-10-31

Is the small hole at the back of the filter body ( near top of the filter body) supposed to be constantly dripping water? When installed with the cord near the small hole, water overflows out of the tank down the cord.

Asked by: Vstro1

Thanks for asking! It is possible for water to drip out of the hole. The filter should be installed so that it sits below the top of the tank. If it is properly installed there should be no leaking as any leaked water would just go back into the tank. For help with troubleshooting this issue please call Tetra at 1-800-526-0650. We are happy to help!

Answered by: Tetra Expert

Date published: 2018-10-29

is there a way to change the setting of the water flow? I got it for my betta and he can barely swim in half of his 10 gallon tank because of how strong it is 

Asked by: alkj

That depends on which internal filter you own. The 3i allows you to install an air flow valve and you can adjust the strength of the air coming from the air pump. The three motorized ones do not have a flow adjustment, and if you have the 10i, your betta should have no issue whatsoever. I have a betta in a 10 gallon with a filter moving 150 gph and he has no trouble at all. None of our internal filters move that much water. I would recommend testing the water to make sure the quality is okay. He could be stressed. In the meantime, you can also place tall plants or a tall piece of decor in front of the filter to break up the flow. BREX

Answered by: BREX

Date published: 2018-10-19

Can you use a pre-filter sponge over the intake with this filter (and pump)?

Asked by: Ppie14

That depends on which internal filter you are referring to...the 3i will take the pre-filter sponge, but it just has a tube that extends down, and the pump is an air pump outside the tank. The 10, 20, and 40 internal filters have internal pumps, but the outer cage is pretty good size, and I do not know of a pre-filter sponge that will fit them. BREX

Answered by: BREX

Date published: 2018-10-10

When you say that you recommend it with the floss side facing into the tank for best filtration. By into do you mean facing forward or back with the filter mounted on the back and inside the tank.

Asked by: Ppie14

It will be facing forward in the filter, towards the middle of the tank. BREX

Answered by: BREX

Date published: 2018-10-03

When you replace the filter cartridge does the tank have to cycle all over again because you're completely changing the filter medium where the good bacteria are.

Asked by: Ppie14

No, not at all. Bacteria is everywhere, but especially in the gravel and the water, as well as all throughout the filter system, not just the cartridge. BREX

Answered by: BREX

Date published: 2018-10-03

Whisper® Internal Power Filter Questions - page 2

Sizes Available

Instructions

For the 10i filter how many time an hour does it filter a 10 gal tank??

I bought the Tetra Floating Starter Kit and the filtration has worked fine, but yesterday it was barely flowing. Today it is flowing so hard I can see the plants moving in the water and my fish has been hiding all day. What can I do?

Where can I purchase the replacement filters?

Is the small hole at the back of the filter body ( near top of the filter body) supposed to be constantly dripping water? When installed with the cord near the small hole, water overflows out of the tank down the cord.

is there a way to change the setting of the water flow? I got it for my betta and he can barely swim in half of his 10 gallon tank because of how strong it is&nbsp;

Can you use a pre-filter sponge over the intake with this filter (and pump)?

When you say that you recommend it with the floss side facing into the tank for best filtration. By into do you mean facing forward or back with the filter mounted on the back and inside the tank.

When you replace the filter cartridge does the tank have to cycle all over again because you're completely changing the filter medium where the good bacteria are.

is there a way to change the setting of the water flow? I got it for my betta and he can barely swim in half of his 10 gallon tank because of how strong it is