1. The first Layer: Physical filtration
Put filter cotton and biochemical cotton into the first Layer of the Filter box to segregate the dirty matters.
2. The second and third Layer: Biological filtration
A. Biological filter, Biochemical cotton, glass ring and other filter material will be used in this step.
B. When the water flow through, its exposure to moisture in the air leads to an increase of Oxygen content ,which will provide a suitable environment for fostering aerobic bacteria and nitrifying bacteria.
C.You can add some filter Boxes according to your need.
3. Double rain pipe
The design of double rain pipe can avoid the spillover due to the high operation of the water pump in the single rain pipe.
4. Larger water outlet
A. Diameter 48mm water outlet drain off water more easily. A long Muffler pipe is provided, which help lower noise and improve the filter effects.
B. In the bottom of the Filter box, there are 88 Drip hole in 4mm diameter. The water will drain off more easily and the dissolving oxygen amount will improve so that it is beneficial for cultivating nitrifying bacteria.