Early spring is the best season for stocking fish, because at this time the water temperature is lower, the fish's activity is slightly weaker, and the fish body is strong, the scales are tight, the nets, fishing and transportation are not easy to be injured, and the survival rate of the fish stocks can be improved. When stocking, follow these steps:
1. Choose high-quality fish species: those that are neat in size, bright in color, with thick back muscles, scales, and fins intact, no injury to the body surface, and no parasite species; general specifications should be greater than 13 cm and grass carp larger than 15 cm.
2. Pond disinfection: Disinfect clear ponds in the aquaculture waters before stocking, remove excess silt, and disinfect and kill with lime and bleach.
3. Fertilizer water quality: After the fish ponds are sterilized for 5 days, fresh water should be added. Before stocking fish species, base fertilizers (preferably farmhouse manure) should be applied to breed the natural food organisms in the water body so that the fish species can have more abundant foodstuffs. Look at the situation of the feed if you need to top-dress in order to keep working and applying less, so as to prevent deterioration of water quality and prevent the growth or survival of fish.
4. Disinfection of fingerlings: Before the fingerlings are released, the fish should be sterilized and sterilized with 2%-3% saline or potassium permanganate solution for 5-10 minutes to disinfect pathogens.
5. Fish ponds: Choose the best fish for the sunny day, and choose the place for the fish on the top. The operation should be light and fast, and be careful and careful to prevent fish from being injured. In the lower pool, the temperature difference between the water temperature in the container and the water temperature of the culture water should be controlled within 3°C.
6. Feeding in time: After 2-3 days of stocking, the fish have adapted to the environment and should start feeding the feed.
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