When using the filter cotton, you need to pay attention to the order of placement. The filter layer contains many kinds, such as physical filter cotton, biochemical cotton, ceramic ring and so on. In the specific placement, their positions are different, and they can be placed according to the following steps:
1. Top layer: The most common physical filter cotton is best placed on the top layer. They are used to filter some of the larger impurities in the fish tank. It is suggested that the filter cotton be placed twice so that it can be cleaned cyclically or separately, and the other layer can be used when cleaning one layer. However, there will also be some nitrifying bacteria on it, which needs a little attention in the process of cleaning.
2. Biochemical cotton: Biochemical cotton can be placed on the lower layer. Generally speaking, they are not particularly dirty, so they do not need to be cleaned frequently.
3. Ceramic ring: The ceramic ring can be placed on the third layer. They can be put more, and their role in improving water quality is still relatively large, so that they can account for 3% to 5% of the whole water body.
4. Activated carbon: There is another special kind of activated carbon. This is not necessary to use, if the water has a fishy smell and odor can be considered to use, in other cases do not use is also possible.
When using the filter cotton, you need to put them in the filter box. If each layer between the cartridges is separated, whichever layer is placed first will do. If each layer between cartridges is not separated, it can be placed from the lowest layer.
