Mesh bag package allows you to use and maintain it conveniently, so you can just take it out and rinse with some cold tap water for a few seconds.

Each pc of ring is oblique section Structure, which diverts water and oxygen flows to every corner of media, then cultivate bacteria higher efficiently.

Due to its abundant porous, it has higher rate of water absorption and balances aerobic and anaerobic bacteria as well.

Besides, it offers more surface area which is 1150 square meter per liter for bacteria cultivation. Therefore, it maximizes filtration space and builds a healthy micro system and.

Nitro Ring has passed test of RoHS so you can use them freely. It has no bad influences on your fish or other aquatic life.

Nitro Rings can be used for both freshwater and marine water tank.  We advise to use in biological filtration chamber.