Fish always have certain signs in front of floating heads. Grasping these laws will help prevent floating heads and reduce economic losses. 1. Forecast based on the weather forecast and the weather conditions of the day. If the summer meets with rainy weather, low air pressure, weak winds, heavy fog and other bad weather, or when the evening weather turns cloudy, thundery showers, or long-gray rain, fish eat well, when the water quality is too fat, sudden changes in the weather, morning and evening may occur Floating head. 2. Forecast based on the characteristics of the season. Under normal circumstances, the water temperature in spring and summer gradually increases, the food intake of fish gradually increases, the water quality gradually turns to fat, and the storage of pond fish is large. In case of sudden changes in weather, it is prone to floating heads. In the continuous rainy weather in summer, the light intensity is weak, and the photosynthesis of phytoplankton is not strong, and floating heads are most likely to occur. In autumn, the adult fishes have reached the commercial specifications, and the amount of adult fish in the pond is large, and the water quality is high. Although the temperature is decreasing day by day, the amount of oxygen consumed in the pond water is increasing, and the weather changes easily and floating heads are prone to occur. 3. Forecast based on water quality. In summer, the concentration of plankton in the water body is large and its transparency is small. In case of abrupt changes in the weather, especially when the temperature suddenly drops, it will easily cause a large number of plankton deaths and the water quality will suddenly become clear. At this point, the rapid increase of oxygen consumption factors in water often occurs with serious floating heads and flooding ponds. 4. Forecast based on the fish's feeding situation. If there are few fish feeding during feeding, eating less, or feeding less than before, and no fish disease is found, we can conclude that the water quality of the fish pond is not good, and the amount of dissolved oxygen in the water is low. . This phenomenon is generally more obvious in the morning and the first meal, if the last meal in the afternoon is also the case, the possibility of early floating head at night is very large, should attract our attention. In addition, it can be judged by observing the feeding conditions of grass carp. Under normal circumstances, grass carp usually feeds in the food field and can only see the grass piles being tossed or the grass being dragged to the surface. If the grass carp eats on the side of the haystack, or even swims around the grass, this is also a sign of low oxygen in the pond. In this case, the floating head is prone to occur.
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