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

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

Bought for grandaughters fish tank

Great quality filter

Hard to find.

We bought a Betta tank from PetSmart, and needed new filters. Found these and they work d great at a fraction of the price. Will buy again when I run out.

Exactly what I was looking for!

Expensive

More than likely one of the best filters in the market ! Great for one month at a time

Good packaging, easy to use

We use these for a 2.5 gal. tank with a male Betta. These filters work well and the water remains clear for 1 month. Please be sure to rinse a new filter with clean water to remove all charcoal dust before use.