Top Fin EF-S Element Filter Cartridge Value Pack 12 Month Supply 2.1 in X 3.7 in

Works well

Great product and value

Super Easy to replace

Easy to replace and easy to use

These work really well for my 5 gallon tank I tried a larger system up to 10 gallons but this is better filters and less bulk.

When it arrived, the Amazon packaging was fine, but the original box that the filters were in was ripped, bent, and open. I had to use packing tape just to put it back together enough to store it in my cabinet.

Fit perfect in the filter and do the job .

Works perfect for my 3 gal. aquarium.

Good product.

I have one betta in a 3.5 gallon tank. My filter takes two cartridge and I change them out at every cleaning, which is about every 4 weeks. The filters hold up well and actually dont look that soiled at 4 weeks but I change them anyway. I purchased my first box of these back in June 2021 and now on my reorder received the same product.