The one-year plan is spring, and fish farming is no exception. If the spring can be well-fed, it must be more effective. When we first refer to the "floating head" of fish, the first thing that comes to mind is that the summer rainy season is prone to happen. It is not known that the "floating head" of fish in the spring is also secretive. In spring, when the temperature rises, the metabolism of fish increases, the activity increases, and the oxygen consumption increases, and “drifting heads” can easily occur. Because this "floating head" occurs in the spring when the water temperature is low and it is not easily noticed, it is called a "drifting head." Symptoms are that the fish floats on the top of the water. From time to time, the mouth stretches out to the surface to soak up the air. Severe suffocation can cause death. The main reasons for the "floating head" of spring fish are as follows:

The density of the fish species is relatively large and the ponds have not been divided in time, causing an oxygen-depleted floating head.

After the water temperature rises, fish ingestion and activities are strengthened, and the oxygen consumption increases. Simultaneously, the large amount of feces in the fish is discharged, and the decomposition of organic matter consumes oxygen, which can easily cause the dissolved oxygen in the water body to decrease, resulting in the lack of oxygen “floating head”.

Fish ponds have been unclear for many years, wild fish and other over-proliferation, and competition for oxygen with farmed fish, resulting in anoxic "floating head" of farmed fish.

The degree of fattening water quality can also cause fish to “float”. The water quality is too fat and even polluted. The organic matter in the pool water consumes a large amount of dissolved oxygen and causes a decrease in dissolved oxygen. The water quality is too thin and the plankton is poor. The dissolved oxygen in the water mainly comes from the photosynthesis of phytoplankton. The reduction or disappearance of phytoplankton causes the dissolved oxygen in the water. The amount is low. Therefore, water quality that is too fat or too thin can cause fish to lack oxygen "floating head."

After a continuous sunny day, the next spring rain caused a sudden drop in surface water temperature, resulting in convection of the upper and lower aquifers, causing an oxygen-deficient "floating head."

Farmers do not control the feeding and feed too much. The residual feed rots and decomposes to produce ammonia, which causes the concentration of ammonia and hydrogen sulfide in the water to be too high, causing fish poisoning to “float”.

Too much organic matter at the bottom of the pond, low pH, decomposition of organic matter produces large amounts of ammonia and hydrogen sulfide, causing fish poisoning "floating head."

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