On December 28, 2011:
My business is buying and selling fish, aquariums and accessories. I have 40+ aquariums set up and I use mostly the same type filters on these aquariums, so I can use the same cartridge replacements. These Whisper Cartridges are easy to change, can be cleaned 2-3 times, allow me to add any type of media (charcoal, ammonia remover, crushed coral for pH control and anything else I desire) and can be used in both fresh and salt water. It is a great value to buy these in this bulk quantity

On December 16, 2011:
The Bio Bags at this quantity is a good buy for the money. All the makings are included to refresh your filter when needed for this low price.

On December 15, 2011:
I was happy that these bags were easy to assemble and work great.

On March 15, 2011:
I have been using these filters in our 25 year old Eastern Painted turtle's residence for many years and they work quite well. We live in a remote area of northern PA and reasonably priced supplies of most anything are hard to get. I was overjoyed to find this supplier.

On January 13, 2011:
These were the best priced filters I could find online. They work with my whisper power filter 40. They work great!

On December 1, 2010:
Best price known versus local dealers. Free shipping, although long, was worth it.

On November 26, 2010:
This product has always been my favorite to use. They last quite a while if cleaned regularly.

On October 28, 2010:
I love that they are shipped right to your door!

On October 11, 2010:
We recommend the this cartridge as replacement filters and its efficiencies and more importantly the pricing.

On October 4, 2010:
We have a big fish tank with some big Koi and gold fish. Since 5 yrs we use this filter cartridges and it works very well and keep the water clear.

On September 16, 2010:
About half the price the pet store wants. I just wish they would make a product that can be reused more than a couple of times. After cleaning these filter bags once, they fall apart on the second cleaning. I use these type filter bags for nearly all of my 45 tanks.

On July 31, 2010:
I have been using these filters in my fish tank for many years. At present, I have gold fish that are about 3 years old. The filtering system works well. The bio-bags need to be changed every two weeks, which can be expensive. The price I paid at Petmountain was the cheapest I have found.

On July 26, 2010:
great price, easy to use, fast delivery. I will definitely order again.

On July 17, 2010:
I have been using the Tetra Whisper Bio-Bags for decades. It is very convenient to change and very effective in filtering water debris. The water is maintained crystal clear. The bags can be used twice. I rinse the bags once and change out the old charcoal with new.

On June 10, 2010:
I was very happy to find this 1-Pack available as they are rather expensive in my local pet store which only sells them individually. The item I received is exactly what I expected.

On April 1, 2010:
Exactly the same quality product I can buy here, but for much less $$$ ! Color me happy!

On February 18, 2010:
I've been using this product for years and it works really well. Maybe too well because it traps so much stuff I have to replace every 3 weeks at least.

On February 2, 2010:
The trend seems to be going to the all-in-one filters, which are very convenient, but not as effective and as durable as the Bio-bag filters. Thank you Pet Mountain for having them and shipping them so quickly! You are now "My Source" for filters!

On January 17, 2010:
I had no problems ordering from this company. I would definitely order more from Pet Mountain.. Great job!

On January 2, 2010:
I'll continue ordering products like the Bio-Bag disposable filter cartridges from Pet Mountain. Pet Mountain offers this and other products that I ordered at a fair price. I bulked up my order a bit with things that I needed, and Pet Mountain waived the shipping charge! All items were received as expected in excellent condition.

On September 25, 2009:
The filters we ordered are great for our goldfish tank. We have used them for the past 4 years and have no complaints. Thank you.

On September 29, 2007:
1/2 price of walmart, you guys rock

On August 20, 2007:
Assembling these filters is very simple, takes less than 5 minutes to assemble two cartridges. These cartridges work wonderfully to keep water crystal clear.

On July 10, 2007:
I really like these filters; they work well and are more reasonable than others, especially the unassembled ones. I would recommend these to anyone

On March 8, 2007:
I have a community tank, adding a variety of food. Flakes, pellets and granuales. The bio-bag, keeps excess food out of the cycle so there is no build up of nitrates. Plus, the carbon helps the water stay crystal clear. Thanks TETRA.

On January 11, 2007:
The Bio Bag Cartridges by Tetra provide one aerobic frame, Thick N' Fluffy filter bags and activated carbon in pre-measured vacuum sealed envelopes.

All that you need to do is to slip the filter bag over the frame, open the carbon envelopes, place the carbon in the filter bag, clip on the top to the frame to seal the filter bag, rinse under cold water and insert into the Tetra filter. The filter goes a great job keeping aquarium water crystal clear.

This could well be a messy job, but with the Bio Bag Filter Cartiridges it is a breeze. You are able to keep your aquarium looking great and you have none of the mess that typically goes along with using carbon as a filter medium.

On January 6, 2007:
This filter is economic and the cartridges last a long time. Plus my turtle is happy to have crystal clear water thanks to all the waste getting trapped in the filter cartridge!!

On December 4, 2006:
Cheap and easy to use, what more could you ask for. I have 5 tanks running with these filters!

On December 4, 2006:
Overall I am very pleased with this easy to use and cheap filter packs. I have two Whisper 60s on my 120 and they keep it clean even with 30 good size cichlids in it.

On November 9, 2006:
Great product, change filter media with no muss or fuss and in under 5 minutes. I have 2 of these filters.