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  • Tetra 25816 Whisper In-Tank Filter with BioScrubber, 3 to 10-Gallon
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Tetra Whisper In-Tank Filter

by Tetra
| 11 answered questions

List Price: $30.99
Price: $8.99 & FREE Shipping on orders over $35. Details
You Save: $22.00 (71%)
Only 8 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
Upto 10-Gallon
  • Designed for Use in Smaller Aquariums Up to 10-GallonUses Medium Whisper Bio-Bag Cartridges
  • Uses Medium Whisper Bio-Bag Cartridges
  • Provides convenient 3 stage filtration
27 new from $8.67 2 used from $8.46

Frequently Bought Together

Tetra 25816 Whisper In-Tank Filter with BioScrubber, 3 to 10-Gallon + Tetra 26160 Whisper Bio-Bag Cartridge, Unassembled, Medium, 12-Pack
Price for both: $18.87

Buy the selected items together


Special Offers and Product Promotions

Size: Upto 10-Gallon
  • Buy Used and Save: Buy a Used "Tetra 25816 Whisper In-Tank Filter with BioScrubbe...” from Amazon Warehouse Deals and save 72% off the $30.99 list price. Product is eligible for Amazon's 30-day returns policy and Prime or FREE Shipping. See all Used offers from Amazon Warehouse Deals.

Product Details

Size: Upto 10-Gallon
  • Product Dimensions: 4.2 x 4 x 8 inches ; 1 pounds
  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0002DHYF4
  • Item model number: 25816
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (301 customer reviews)
  • Amazon Best Sellers Rank: #2,517 in Pet Supplies (See Top 100 in Pet Supplies)
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Product Description

Size: Upto 10-Gallon

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.


Customer Questions & Answers

Customer Reviews

Product is very easy to install and works great.
Carmen
The filter does keep the tank clean but it takes up too much space in my small tank and is not attractive to my eye.
T. Depew
I sat the pumps on little towels, hung them up and still didn't get that loud vibration sound away.
Maria

Most Helpful Customer Reviews

40 of 41 people found the following review helpful By MST on July 11, 2009
Size Name: Upto 40-Gallon
I own 7 pet turtles. I have two red-eared sliders, four mud turtles and one map turtle. I use the Whisper 40i filters in all my turtle tanks. After trying several different types of filters (ie Zoo Med 501 and Reptofilter) for my turtle tanks, I have found that these work the best and are the easiest to use.

First of all, they do keep the water clean as long as you change the filter media regularly. How often it needs to be changed depends on the type of animal, or in my case turtle, that you own. It also depends on the amount of water in your habitat and other factors. The replacement media is fast to change and more inexpensive than the replacements for other turtle filters I've used.

The filter can be either hung on the side of the tank or completely suction cupped to the side. For functionality, I have found that tanks with shallow water do better with the filter sitting on the bottom of the tank and attached to the wall. Also, pets that are more likely to knock the filter down should have it attached to the wall instead of hung. When it falls in the water, the tank can become very dirty within a matter of hours. My sliders kept knocking one in the water and now the motor does not seem to work as well as it once did.

Make sure that your tank will have at least 4 inches of water in it or this filter will not work for you.

Overall, a solid product!
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42 of 47 people found the following review helpful By Lisa C. on June 22, 2008
Size Name: Upto 10-Gallon
I have two African dwarf frogs and was missing a frog one night.
I could not find her. I finally found her in the filter.
I have now learned through reading other web sites; it's best to put pantyhose or cheesecloth over a part of the filter, (use common sense on watching how it does filter so the filter will still do it's job) to protect your frog from becoming stuck.
My girl was saved.
The filter does work, just be careful and aware if missing an aquarium baby.
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34 of 38 people found the following review helpful By Hannah on January 7, 2011
Size Name: Upto 3-Gallon Verified Purchase
I first bought this filter for my 1.5 gallon tank that has a betta fish in it. It was the perfect size for the tank. It did a really good job at keeping the water in the tank clear. At about 8 months after I bought it, the water would only trickle out of the filter. I tried taking it apart, cleaning the filter out, putting it back together (as sometimes gunk builds up in my other filter that slows the amount of workload it can handle). No change. I originally planned to buy a different brand of filter, but I couldn't beat this price and still had some filter cartridges left over. I saw that other people have said that they have bought more than one with better luck. So, I decided to take the risk. I was curious to see what the problem was, so i tried substituting certain parts of the filter with the old one. The problem was definitely the little motor. For some reason it didn't push air through the filter as much as it did in the beginning.

Either way, I do like the filter and I hope this one holds out. Its perfect for a betta fish's tank- and I like the price.

------

Wrote that review on January 7, 2011 and it is now February 10, 2011 and the filter is no longer working the way it should. The water only trickles out of the filter, making it unable to do its job. I'm sick of having to deal with this.. I would just like my filter to work like it said it would!!! Don't buy this filter unless you want to replace it a month later....(This is the second one I have purchased with the same result.)
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25 of 29 people found the following review helpful By littlemiss on July 28, 2011
Size Name: Upto 3-Gallon
i had this filter for a grand total of a week before installing a new one, i would have taken it back to the store the same day if i had another option for a filter, however i went ahead and purchased the TOM Aquarium Mini Internal Filter 45gph adjustable flow online (which is working perfectly by the way) and waited for delivery. so why is this filter so horrible?
1) the noise is unbearable, this tiny filter for a 3 gallon tank is louder than another filter i have for a 75 gallon tank! unbelievable
2) its made of cheap plastic parts, ( the "lid" broke off during assembly)
the ONLY good thing about this filter is the fact that it is gentle the current is very weak, suitable for my delicate finned male betta.
as for as how it does with actual filtration, for the week i had it, it kept the water clear and well circulated; as far as any long term use i wouldn't know about but honestly in my opinion i wouldn't be surprised if this thing didn't last more than a month, its that flimsy.
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11 of 11 people found the following review helpful By Robin M Smith on February 13, 2011
Size Name: Upto 40-Gallon Verified Purchase
Had to buy 2 of these within 2 years, they don't hold up long enough for the price you have to pay, motor quit, it should last longer than what it does.
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12 of 14 people found the following review helpful By Akira Kun on July 20, 2011
Size Name: Upto 3-Gallon
This filter is a clever design using the airlift principle, the rising bubbles force water up the intake tube, flows through the filter cartridge, and returns water back into the tank.

However, like everyone else says the air pump that comes with this filter is pretty junky and not powerful enough. Filters like these need a good air pump, I personally use the AirPod® Air Pump w/Battery Back-Up for up to 55 Gallon Tanks as it's heavy duty enough and lets you adjust the air flow. You can also use a less expensive air pump (or any other reliable one), as long as it's powerful enough it should do the job.

The filter itself is simply built in design but seems sturdy enough (the lid was kind of flimsy) but it does the job keeping the water clean and circulated. If you plan on getting this product, I suggest getting a more reliable air pump and it should work the way it's advertised. I also wish this filter could be sold alone, without the junky air pump included. It would make the price even lower and let people choose which pump they wanted.
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