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  • Tetra 25900 Whisper Bio-Bag Cartridge, Small, 2-Pack
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Tetra Whisper Assembled Bio-Bag Filter Cartridges

by Tetra

Price: $7.16 & FREE Shipping on orders over $35. Details
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Small, 2-Pack
  • Color-coded packages for ease and accuracy in selection
  • Convenience of being pre-assembled
  • Filled with Ultra-Activated carbon, removing waste particles, odors, and discoloration
  • Please read all label information on delivery
30 new from $0.45

Alpha House Gift Guide

Frequently Bought Together

Tetra 25900 Whisper Bio-Bag Cartridge, Small, 2-Pack + Tetra 25846 Whisper In-Tank Filter with BioScrubber, 1 to 3-Gallon + Zoo Med Laboratories AZMBL20 Betta Hammock
Price for all three: $18.30

Buy the selected items together


Product Details

Size: Small, 2-Pack
  • Product Dimensions: 5.5 x 3 x 0.6 inches ; 0.3 ounces
  • Shipping Weight: 0.8 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B000HHLHDK
  • Item model number: 25900
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (185 customer reviews)
  • Amazon Best Sellers Rank: #4,008 in Pet Supplies (See Top 100 in Pet Supplies)
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Product Description

Size: Small, 2-Pack

For the ultimate in convenience, choose assembled Whisper Bio-Bag cartridges. They are in color-coded packages, making it easier than ever to remember which cartridges to purchase on subsequent trips to your local aquarium store.

Customer Reviews

These filters work great for our 55 gallon tank.
Time to Read
The product fit was perfect and even works better then the ones I end up buying at the local pet store.
Rhys
I change them once a month and it keeps my tank clean.
LivinLife

Most Helpful Customer Reviews

16 of 16 people found the following review helpful By antmakka on December 26, 2011
Size Name: Small, 2-Pack Verified Purchase
My local pet store doesn't stock these so buying them online was the next best option. They seem to need replacing more than once per month but washing them under running water prolongs their usefulness. Remember to have plastic side facing the front.
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Size Name: Small, 2-Pack Verified Purchase
I have the above mentioned aquarium kit. I can confirm that this filter will work in the Mini Might filter that comes with it.

http://www.amazon.com/Aquarius-Aq15005-Rounded-5-Gallon-Aquarium/dp/B007KKU8QE/ref=pd_rhf_cr_p_t_4_MN0F

My fish is happy and the tank looks clean. Can't complain. :)
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9 of 9 people found the following review helpful By T. L. Allen on March 28, 2010
Size Name: Small, 2-Pack Verified Purchase
It has been numerous years since I had my own aquarium with all the required accessories. Tetra has made some pretty outstanding products since that time and these filter bags do exactly what is required for small aquariums. As soon as I bought this filter with these carttridges, the water has been clear and clean ever since. These cartridges last about 30 days before needing replacement.
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8 of 9 people found the following review helpful By Cat Fish on April 27, 2011
Size Name: Small, 2-Pack Verified Purchase
this is a great deal. it's a great filter as well. the only thing is that you need to change it out at least once a month or the filter will fall apart and the white fibers will spill all over the tank. it freaked me out when i saw the white fibers. i thought it was a whole bunch of little white worms. then i realized, upon changing the filter and water, that the filter fell apart.
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5 of 5 people found the following review helpful By Dalton Grisham on March 30, 2012
Size Name: Small, 2-Pack Verified Purchase
I bought this filter for my Tetra Waterfall Globe Aquarium (1.8 gallon) tank that I bought off of Amazon. It is both a perfect fit, and does a great job of keeping the water flowing through the filter. It also instantly cleaned up my tank from mucky to clear in minutes!

If you have any questions, or want the exact make of my tank and filter, just comment.
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7 of 8 people found the following review helpful By Amazon Addict on July 9, 2011
Size Name: Large, 3-Pack Verified Purchase
It was a mild headache to find the right size filter cartridge. Tetra had released a new Medium and Large size from their previous release. I took a chance and this one fit my Tetra 10-30i filter. It works really well in trapping the excretions and more from my turtle. I leave it on for a few hours a day and the tank stays relatively clean. Though for the health of my turtle, I still change the water at least once a week.
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4 of 4 people found the following review helpful By Shanna on June 27, 2012
Size Name: Small, 2-Pack Verified Purchase
If this is the right filter cartridge for your filter, it's going to be perfect for you-- if you tried to use it for the wrong filter, of course it isn't going to work! Don't blame the cartridge! This is the cartridge that goes with my filter and it works perfectly. Slip the old filter out after about four weeks (or sooner-- those things can get pretty gross!) and slip the new one into the two grooves in the inside of the filter, and voila!

The package recommends you rinse the filter before putting it in (and turn off the filter before you change the cartridges, just in case) to get rid of any leftover carbon dust. Do that, and your little aquarium is golden!
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4 of 4 people found the following review helpful By Erica on December 12, 2012
Size Name: Medium, 3-Pack Verified Purchase
I love that it is so easy to change and to find the right size. Please dont be like me and forget to rinse the dust out- my fish were giving me evil eye for a whole week.
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