Containing bio filter Pumpkins and Stone Mill Court bite down in the same reactor conditions and the surface area of the biological filter, calculated from the experimental ago .
Contains biological filter bio Court and stone grinding members to develop a dedicated tank with the same condition, and the surface area of a biological filter which is calculated from the last trial.
The biological filter, the Court and the stones, beautifully landscaped grounds, the mill into a dustbin capacity with same conditions and skin areas of the biological filter which is calculated from the experiment,