After entering winter, the temperature drops, the water temperature decreases, the fish activity decreases, and the resistance to disease is weakened. From November 19 to 22, another nationwide cold air process affected most of the country. In order for the fish to survive the winter safely, several schemes for the safe wintering of fish are provided here.
First, enhance the physique of fish
Winter water temperature decreases, eating material weakening will lead to a decline in fish physique, weak disease resistance, body fat reserves will be greatly reduced, cold resistance and frost resistance will also be weakened, incidence will also rise, so scientific management feeding, enhance the physique of fish is very important.
1. Strengthen feeding in autumn and reserve fat for fish. In winter, as long as the water temperature is maintained above 10 ° C, you can continue to feed.
2. Add hepatobiliary products to the feed to enhance immunity, reduce external pressure, ensure the normal hepatobiliary fat metabolism function of fish, and prevent and treat hepatobiliary syndrome.
3. Customized quantitative timing fixed-point feeding, in the case of low temperature, it is recommended to feed 1-2 times a day.
4. Scientific feeding, the amount of feeding should not be too much, and the feeding time is not less than 10 minutes.
2. Water quality management
Dredge the inlet ditch before wintering, repair the flow ditch, breeding pond, etc., to ensure sufficient supply of flowing water. After entering the winter, it is necessary to patrol the pond at any time to observe the water use situation, so as to do three looks: look at the water level, look at the water quality, see the water temperature, especially to prevent muddy water, observe whether the fish have symptoms of hypoxia at any time, pay attention to water quality testing, and maintain excellent water quality.
Third, the prevention and treatment of fish diseases
The main fish diseases that overwintering fish face are water mold disease, gill rot, small melon worm, oblique tube worm and so on. On the one hand, to prevent fish diseases, the water quality of the pond is cultivated as soon as possible, and the pond water fertilizer has a good inhibition effect on small melon worms, oblique tube worms and water mold diseases in addition to the role of heat preservation. On the other hand, the use of Saiyou Yushui Meijing whole pool sprinkling to prevent water mold disease, to prevent the occurrence of water mold disease.
Fourth, management during wintering
During the wintering period, it is necessary to do a good job of regularly testing water quality indicators and measuring the dissolved oxygen volume of water. Usually, the dissolved oxygen condition of the water can be judged by observing whether the water color is turbid and whether the water body has a peculiar smell. In winter, the sunlight is small, and the photosynthesis of phytoplankton is weakened, resulting in insufficient dissolved oxygen in the breeding environment, while not applying organic fertilizer, reducing the consumption of dissolved oxygen, and preventing and controlling fish lack of oxygen in winter.