Tetra Whisper Assembled Bio-bag Filter Cartridges, Large, 6-Count

I buy these regularly as I put new media into my 20 gallon tank's HOB filter every three to four weeks. These are fully assembled and easy to install. I've purchased the ones you put together yourself and it's just not worth the charcoal mess and the mess from taking apart the used wet slimy one to retrieve the reusable plastic frame and clip (sorry, not sorry, I'll be green in other aspects of my life).The seller is great, the filters usually come next day, even if I order on a Saturday and haven't picked next day delivery. I've never had a problem with them at all and I've ordered from them a few years now I've think.

Works better than a traditional filter on my turtles tank. He’s a slob so a good filter is needed. Sometimes he begs and begs for food and then he’ll only eat half and let the other half turn to muck. Sometimes he’s just a damn pig and eats everything! Either way he’s awesome and I’m happy these filters exist. But he’s still a slob...

I've been using Tetra Whisper Bio-bag Filter Cartridges for many years. I depend on them to be safe and effective for use in my aquariums and have never had problems with them. I very highly recommend them to anyone needing filter cartridges!

Fits right in no hassle trying to load in charcoal just plug and play . I would by again .

Best price for replacing filters almost every week.

Your browser does not support HTML5 video.  Great product. It does what it suppose to. Keeps my eight goldfish very happy.

I have a 55 gallon freshwater tank. I wish they came 4 to a box instead of 3, since I use 4 at a time. I love that they are already assembled. They work great helping me keep my tank clean and my fish healthy.

These are so convenient and keep my tank sparkling clean.