Japan imported natural volcanic ash soil, soft sintered by the latest special technology.

Super filtering function, long-term maintenance of water color transparent and clear. 

the new formula provides nitrifying bacteria attachment and growth environment, which can quickly create a good ecology.

It is not easy to disintegrate, can reduce the PH/KH value, is rich in organic acids, provides a slow-release nutrient source. 
is naturally adjusted to be suitable for the breeding environment of weakly acidic ornamental fish, shrimp and aquatic plants.