First, stocking early: because the fish for a new environment, there must be a period of adaptation, early stocking, you can eat immediately after the weather warms up, extend the growth period. When stocking fish, we must choose good weather. Overcast, rain, and snow days may increase mortality. Second, the seedlings are better: stocking fish species must be carefully selected, first of all, the fish species is better, the fish is full, normal body shape, the big body of the fish can not be small, the scales should be complete, the fins are not damaged, the body surface smooth. Another criterion for good seedlings is: squid and squid can hold first-instar fish with a height of 13 cm or more. If there are 0.2-0.25 kilos of fish in each year, it is more ideal. Grass carp can also be used as a species of fish that is 13 centimeters or larger. , It is best to 0.25-0.7 kg of fish species every other year; squid or group of head lice can choose more than 10 cm; squid, squid put 7 cm long fish on it. Third, the density should be reasonable: In general, if the fish pond water quality is relatively refreshing, but also in time to add new water, can be "determined by bait", that is to say, according to the amount of feed can be provided to determine the number of stocked species Quantity, adequate source of feed, can put a little more, if not enough, you can put less. 4. Sterilization should be strict: special emphasis should be placed on the principle of “prevention firstâ€. Liquids should be disinfected when stocking fingerlings. There are many kinds of drugs used for disinfection. The simplest solution is 3% to 4% salt water leaching. Wash for 5-10 minutes (water temperature 10-20 °C). Fifth, the proportion of polyculture should be appropriate: the general water quality of the ponds and other water bodies can be more fertile, squid, the proportion is about 70%, and then with 25% of the grass carp and the head lice and 5% of carp and squid; Thin, grassy pond water can raise more grass carp and head lice, these two kinds of fish plus squid can account for 70%, and then with 30% of scorpion and squid.
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