Biological Filter Media - Bio Balls Ceramic Rings Set with Mesh Bag for Aquarium Filter, Pond and Fish Tank (500g, 1.1lb)

Works great, pieces are a little big but my water is clear seems to be doing its job

These are pretty nice.

I have used this mix in a few of my canisters and it performs well lots of surface to support larg BB colonies if you are the type like myself that like a mix of media in your filtration system this is a great deal just be sure you get enough to fill that stage and you will be happy with the results and so will your fish

I liked the variety of shapes and materials included in the mix.

This would be excellent for bigger filter spaces. I ended up using some pieces and rocks as decorations for my nano tank.

I purchased these bio balls for my 5 gallon aquarium and so far they're working just fine. The water quality is great. I have no complaints.

My pond is now clear as a bell, note: this is about 6 feet by 3 feet and the item is placed inside a bog filter bucket, next to the pump

Love the different shapes, textures, and sizes of these filter media. Different pieces are in different bags and I used them in various tanks to replace or to provide new filter media. Great home for beneficial bacteria.