2. Too shallow water will affect the growth of fish and reduce the yield.
3. The water is too deep, the bottom can't get sunlight, and the dissolved oxygen is low, which is not conducive to material circulation.
4. In general, there are many conditions to meet when building a pond.
5. One is to choose a good location, and the other is to pay attention to the area of the pond, which is generally rectangular and has a stable and clean water source.