Water temperature: The feeding temperature of black spot crucian carp should be kept in the range of 22-26 ℃, in this environment, their appetite is strong, and the growth rate is faster. Water quality: They are suitable for survival in weak acid water, pH can be maintained at 6.0-6.5, soft water is better. In peacetime, we should pay attention to the frequency of sewage and water exchange, and keep the water quality clean. Feeding: Black spot crucian carp is omnivorous fish, can feed red worms, water fleas, tubificidae and other food. In addition, vegetable leaves and aquatic plants can also be properly fed.