Before the fish floats, some phenomena will inevitably occur. Based on these signs, fish floating heads can be scientifically predicted. Before the fish floats, it can be predicted based on the four aspects.
First, make predictions based on the weather conditions of the day. For example, when thunderstorms occur on a sunny evening in the summer, the water temperature on the surface of the pond drops sharply, causing rapid convection in the upper and lower water layers of the pond, which can easily cause serious floating heads. In summer and autumn, the southerly wind is blowing during the sunny days during the summer and autumn, and the northerly wind is blowing at night, causing the nighttime temperature to fall rapidly, commonly known as “south. “Crash North†causes rapid convection of the upper and lower water layers, which can easily cause floating heads. At night, the wind is large, the temperature drops rapidly, the convection of the upper and lower water layers is accelerated, and it is easy to cause floating heads; continuous rain, poor lighting conditions, small wind, low pressure, floating The weakening of photosynthesis in plants results in the shortage of dissolved oxygen in water, which easily causes floating heads. In addition, when the weather is not raining for a long time, the temperature of the pool water is high, and a large amount of feeding water is added. Once the weather turns cloudy, it can easily cause floating heads.
Second, make predictions based on changes in the season and water temperature. From April to May, the water temperature gradually increased, the water quality turned thicker, the water consumption of the pool increased, and the fish did not fully adapt to the lack of oxygen. Therefore, the weather changed slightly. In the early morning, the fish would concentrate on the water layer. See the water bursts of water, commonly known as floating head. This is the first time that the fish floats. Due to its delicate constitution, the endurance to the hypoxic environment is weak. At this time, oxygenation measures must be taken. Otherwise, it is easy to dead fish.
In the rainy season, due to weak light intensity and high water temperature, less phytoplankton oxygen production, combined with low air pressure and small wind force, often cause severe fish floating heads. During the transition period from summer to autumn, the temperature changes drastically, and thunderstorms often cause fish to float.
Third, observe the color to make predictions. The ponds are dense in color, have little transparency, or produce “bloom†phenomena. In case of weather changes, they can easily cause a large number of deaths of phytoplankton in the pool water, increase the oxygen consumption in the water, and cause the fish to flood the pond.
Fourth, check the fish diet to predict. Frequent inspections of the food court revealed that the feed had not been eaten within the prescribed time, and no fish disease was found. This indicated that the pond had poor oxygen conditions and the fish had to float before the next morning. In addition, we can observe the grass carp grazing situation, under normal circumstances, generally do not see the grass carp to eat grass, only to see the grass floating on the water in the flip, grass stems gradually sinking, and can hear the "hedgehog" grazing Sound, if grass carps only eat grass in the grass, indicating that the dissolved oxygen under the grass is very low; if grass grass is found swimming in the pool, want to eat and eat less, indicating that the pool water has been deficient in oxygen, the upcoming floating head .
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