aquarium ceramic bio ring/filter ring 

Different size of ceramic rings, widely used in aquarium filteration.

Ceramic ring/aquarium accessory/filter media

The ceramic rings have a structure of dense holes where live a lot of good vital bacteria.These bacteria help improve biological filtration effect and stabilize water quality

Durable, non-toxic, environment friendly  filter medium ceramic ring good for garden,koi pond ,fresh/salty water aquarium.