Top Fin Silenstream PF-S Small Filter Cartridges (6 Count) Refill for PF10 Power Filters (5.5in x 3.1in)

They go in a fish tank!

fits well in my silent stream filter

Easy to use. As described. Works well

It works As advertised.

The filter and media are self-contained. It fits and works as expected. The change rate is as to be expected as well.

This is the correct filter refill for my tank. It fits. It works. Price is a little higher than buying from a chain pet store.

product as described

This is double the price at Petsmart and is price gouging . The filter itself works fine

The product is filters for the tank. They work

As described. Shipped fast