1. Turning the pond to clear pond
After the fish species has passed the high temperature breeding period in the pond, a large amount of harmful substances will be deposited at the bottom of the pond. After the autumn, the fish species should be transferred to a pond that has been sterilized in the clear pond for cultivation so that the species can safely pass winter. Disinfect the original pond with 75-100 kg of lime per acre, fertilize the water according to conventional methods, and turn the fish back after the medicine disappears.
2, screening division
In combination with the conversion of fish species, the fish species will be sorted and sized so as to be consistent with the specifications of the fish species in the pool. For fish species over 15 cm in size, they can be put into a fish pond culture. Specially small fish species should be cultivated in special pools.
3, control density
In order to increase the survival rate of fingerlings in winter, they should be properly stocked and bred according to the conditions such as water size and depth. 1.5 meters deep pond, acre 7-8 cm long fish species about 4500-6000 tail.
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