Fish always have certain signs in front of floating heads. Grasping these laws will help prevent floating heads and reduce economic losses.
1. According to the weather forecast and the weather conditions of the day, it is forecasted that summer is accompanied by rain, low pressure, weak wind, heavy fog and other bad weather. In the evening when the weather turns cloudy, thunderstorms or water quality is too fat, the floating head may occur in the morning.
2, according to the characteristics of the season to predict: Under normal circumstances, spring and summer water temperature gradually increased, the fish's food intake gradually increased, the water quality gradually turned fertilizer, ponds, large storage of fish, in case of sudden changes in the weather are also prone to floating head . 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, adult fish have reached commercial specifications, and there are large amounts of adult fish in ponds and water quality fertilizers. Although the temperature is decreasing day by day, the amount of oxygen consumed in pond waters is increasing, and floating heads are prone to occur due to slight changes in weather.
3. Prediction based on water quality: In summer, the concentration of plankton in the water body is large. In case of abrupt changes in the weather, especially if the temperature suddenly drops sharply, it will easily cause a large number of deaths of plankton and the water quality will suddenly become clear. At this time, water oxygen consumption factor With rapid increase, serious floating heads and flooding ponds often occur.
4. Forecast according to the fish’s feeding conditions: If there are few fish feeding during feeding, no food is consumed, and no fish disease is found, then the water quality of the fish pond can be concluded to be poor and the dissolved oxygen in the water body is low. This phenomenon is generally more pronounced when the first meal is given in the morning; if the last meal in the afternoon is also the case, there is a high probability that the head will float early at night and should be noticed.
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