The first grid: white cotton, rattan cotton;
The second grid: bacteria room, ceramic ring, glass ring, filter ball, etc.
In the third grid, you can put a fungus room or a medical stone;
Box 4: Pump and heating rod.
Extended data:
Bottom filtration is a kind of fish tank filtration method, which can provide the largest space for filter materials and is beneficial to the cultivation of nitrifying bacteria. The disadvantage is that it is large in size, needs to occupy the space of the bottom cylinder of the fish tank and has high requirements for the water pump.
Generally, there are physical filtration area, biological filtration area, equipment area and sedimentation tank.
The bottom filter is generally hidden in the bottom cabinet, which is beautiful and tidy as a whole. The bottom cabin can be used for water change and other operations, which can significantly reduce the impact on fish in the fish tank.
Encyclopedia-bottom filtering