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

Adequate.

Use them in my marineland biowheel filter. Cheaper than pet store price.

Works great

These fit perfectly and the price is great

The box was completely smashed when it arrived. It was sent in a plastic bag instead of a box. Most of filters seemed ok but the little “filter rocks” were everywhere. I’m assuming it will affect the quality somewhat.

excellent!

About the only kind available. Soooo

This was a fair price for the exact filter I needed. I like the fact in came in a 6 pack, which will last me awhile. Thanks!

Good

They work great!