How to put four squares in the bottom filter fish tank?

The four squares of the bottom filter fish tank are placed as follows:

The first grid, white cotton, rattan cotton;

The second grid, bacteria room, ceramic ring, glass ring, filter ball, etc.

The third box, can put the bacteria room or medical stone;

The fourth frame, put the pump and heating rod.

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 huge, takes up the space of the bottom cabinet of the fish tank and has higher requirements for the water pump.

There are usually physical filtration zone, biological filtration zone, equipment zone and sedimentation bin.

The bottom filter tank is generally hidden in the bottom cabinet, which looks beautiful and tidy as a whole. Water changing and other operations can be carried out in the bottom tank, which can obviously reduce the impact on the fish in the tank.