6-Pack, Size B, Rite-Size Cartridge Refills

Yes they did

They fit in the fish tank

These filters keep the watter clear and my fish happy

Available

Good seller

Fish died a few day after install

I get twice as many at this price compared to what I was paying in the store.

Great

This is the easiest to use, most complete, and easiest to use kit on Earth. It has guided me thru my new Aquarium and I am so satisfied! This fron a 50 year okd aquarium aficionado. Thank you!

Exactly what I needed for our fish filter.