Where do you put the denitrogenation square bricks in the fish tank?

Nitrifying bacteria can be put in a fish tank with fish. I suggest you put nitrifying bacteria directly in the filter box. Put a layer of filter material in the filter box (including ceramic ring biochemical ball in the bacteria room, time ball, etc.). ), and then spread a layer of filter cotton on the filter material, so that water can flow through the filter cotton to achieve the effect of physical filtration (filtering out large food residues, fish droppings, etc. ), and then filter the material with water to achieve the effect of biochemical filtration (filter material is the best place to cultivate nitrifying bacteria for their implantation and reproduction). Nitrifying bacteria can decompose harmful substances in fish tank water and make fish grow healthily. So I suggest you put nitrifying bacteria directly into the filter box in proportion once a week. Generally, after two or three days, you can see that the water quality of the fish tank has improved very well, the water is clear and the fish are beautiful.