1.Suitable for fresh water- salt water fish tank.
2.To fully exert biological filtration capacity of law porous filter ring.
3.This product is mix made of the softy active carbon and ceramic.
4.Chemically stable- fully in line with the original micro-organisms living chemical environment.
5.High permeability- which can be aerobic nitrification and anaerobic
denitrification- to make the water more stable- is the best biological filter material.