What filter materials do you need on the fish tank?

Fish tank filter materials are generally filter sponge, biochemical cotton, ceramic ring and glass ring.

General fish tank filter box filter material placement order is:

1, the upper filter cotton is the most basic filter material with the highest utilization rate. No matter what kind of filter, it is basically essential. The main function is to filter out a lot of fish excrement and other wastes in the water, so that the filter material behind can play a role.

2. The function of the intermediate biochemical cotton is mainly to play the role of biochemical filtration. Compared with cotton filter, it is dense, not easy to be damaged and much thicker, so there is enough space to parasitize nitrifying bacteria.

3. The function of the lower fungus house and ceramic ring is to use its special structure and pores to parasitize more nitrifying bacteria. However, it does not have physical filtering function, so it must be used behind the cotton screen.