Sequence of fish filter materials
Third: biological filtration first place biochemical cotton (Note: to choose the right size of aperture, high strength, high elasticity, high water filtration rate);
Second stage: chemical filter stage placed activated carbon, ammonia stone, zeolite, clear water resin and other chemical adsorption filter (note the adsorption effect of this kind of filter is generally only three months, expired must change)
Physical filtration grade cotton fiber (Note: can be placed in the outlet pipe on the sleeve socks for filtering suspended solids and easy cleaning);
Level fourth: biofiltration, placing biochemical balls at second levels (Note: the capacity of this level is large and the number of biochemical balls as much as possible);
