2. Cultivate nitrifying bacteria. Nitrifying bacteria have the function of automatically cleaning the bottom of the pool. A large number of nitrifying bacteria are cultivated in the biochemical net plate and bottom sand in the pond to decompose fish manure in time, keep the water body stable and clear, and make the fish healthy and less sick.
3. scavenger fish was introduced into the aquarium, and scavenger fish could clean the aquarium by sucking the excrement of other fish.
Extended data:
Advantages of bottom filtration: bottom filtration provides the largest space for filter materials, so it has the strongest treatment capacity (note that it is not efficiency). Conducive to the cultivation of nitrifying bacteria.
Generally speaking, the bottom filter screen has 3 or 4 grids, and the order of filtering materials is: the first grid, white cotton, rattan cotton, and the second grid; Bacteria room, ceramic ring, glass ring, filter ball, etc. (You can choose one or both); In the third grid, if it is the last grid, you can put the pump and heating rod, if not, you can also put the bacteria room or medical stone; But in the end, you need to leave a space for the pump and heating rod.