Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Unassembled Medium (Pack of 12)

when I poo in the bags, it runs out easily. They should be bigger and smell proof.

Great

I only wish the box had included 2 of the plastic frames as my aquarium filter has 2 sections that need the filters. Now I need to wait until these are used up to buy another box to get the 2nd frame.

Great value

Perfect!

Excellent quality, great price, speedy shipping and works well.

Been using this product for years. It takes patience to put it together but fish stay healthy with the filtration.

Gotta change the filter frequently as I have two very large Koi that eat lots of food and that means lots of excrement.

Very good deal

Very easy to use