If you add cold water, you won't get milky soup, because adding cold water after frying fish will organize the formation of protein in the soup, which is protein condensation, which is not conducive to the formation of nutrients in the soup.

Fry the crucian carp on both sides until golden brown, then add boiling water, remember to add enough water you need bit by bit. Considering the evaporation of water in the process of cooking soup, it is necessary to add more in moderation, otherwise the amount of soup will be very small in the end, and adding water in the middle will also lose the nutrition in the soup. Adding salt when preparing soup after completion will also make the soup more nutritious and delicious.