Tetra Whisper Assembled Bio-Bag Filter Medium Cartridges, 3 Count (Pack of 2)

Good filters but too expensive. I will continue to buy because they are the best I've found. But I will continue to grumble about the cost.

I have been using this filter for several years and have no problem with it. My gold fish is now about 16 years old and if the filter is assisting him in his age...it is doing a great job.

They fit, I assume they're working, they do require assembly and I didn't find instructions so I checked online. It's pretty straightforward and I didn't have any trouble getting them put together and into the filter. The price is by far the best I found and totally worth the 60 second assembly with each change

Love the quiet filtration.Love the efficacy.My aquarium is ckear fir a month before I needed to change the filter...and I had live plants and sunlight streaming into my aquarium.

Good value

These are just what I need: good price, no assembly, pop in my filter and it does it's job for a solid month or more.

So disappointed...had to replace within a week of use. Thought it would last at least 3 weeks, but that was not the case for any of them. Sometimes you get what you pay for in quality.

Product as described! Fit perfectly!

Easy to use already asembled

excelente producto. llego en excelentes condiciones. y muy rápido