Top Fin Retreat RF-S Filter Cartridges (Small) Refill for Desktop Aquariums with Small Retreat Filters - 8.1in x 1.9in (6 Count)

I love that came quick and is great doe that price

Works great for the filter. Easy to change cleans the tank flawlessly

I have been looking for these filters in every single pet store I could find and amazon seems to be the only place that carries them. Very happy with purchase they work great.

Convenient. Easy to change.

These work as advertised

quality is what is expected

Gets the job done and excellent quality!

Cleaned my tank within minutes

Great quality filter

I bought a used tank and wasnt exactly sure what size the filter was, but the descrition was exact and I ordered the right size the first time.