Floating head is a common symptom in fish culture. When a floating head generally occurs, the fish farmer first thinks that the water body is in an anoxic state, resulting in many reasons for the lack of oxygen in the water body. The floating head treatment methods caused by different reasons are also different. Fundamentally governing the floating head phenomenon, we must first find out the reasons.
Thin floating head
The floating head caused by water thinning generally occurs in the spring warming season every year. As the water temperature rises, after the water body is disinfected and fertilized, the zooplankton in the water will multiply, and the phytoplankton will gradually weaken and even become deficient, resulting in a significant increase in the oxygen consumption of the water body. The pool water becomes thin and pale or light brown. Since the water temperature is not high at this time, the floating head phenomenon is not obvious and it is easily overlooked.
Countermeasures: You can use bactericidal red, wheel net, etc. to control the amount of zooplankton in the water, and immediately fertilize with fertilizer and water; adhere to the use of photosynthetic bacteria, EM bacteria and other micro-ecological agents that can regulate the water, a reasonable aerator, and water conservation. Fertilizer.
Floating head caused by water and fertilizer
Excessive water in the water body can also cause floating heads in the breeding object. The cause of excess water in a body of water is generally due to the large amount of unfermented manure and the accumulation of excessively thick silt bottoms and residual feces in the water. These substances consume large amounts of oxygen in the water when the temperature rises significantly. As a result, the water body is deprived of oxygen, and floating animals appear in the farm animals.
Countermeasures: Regularly remove excess silt and residual feces from the bottom of the pool, and regularly use detoxification bottoms, sediment modifying agents and other preparations that can adjust the quality of sediments to keep the water body fat moderately; pay attention to time when fertilizing, and choose sunny morning Spilled.
Ammonia poisoning
When the aquatic environment contains excessive accumulation of toxic substances such as ammonia nitrogen and nitrite, it will cause ammonia nitrogen poisoning and other symptoms in farmed animals, causing floating heads.
Countermeasures: In order to create a healthy ecological environment for breeding animals and to adjust the pool water, long-term selection of safe, residue-free, green micro-ecological agents, such as EM bacteria liquid, EM freeze-dried powder, photosynthetic freeze-dried powder and other water quality regulation, In this way, a good and healthy ecological environment can be obtained and fish floating heads can be prevented.
Floating head caused by aquatic plants
After the medium-term cultivation, the pool water is fertilized due to the accumulation of substratum and fertility, which is beneficial to the growth and reproduction of blue-green algae. At this time, the water quality of the pool deteriorates, and ammonia nitrogen, hydrogen sulfide, etc. accumulate in a large amount, and floating head phenomenon easily occurs.
Countermeasures: Increase the number of patrol ponds and observe the color of water. If harmful algae such as blue-green algae are found, algae net and cyanobacteria net can be used for algae removal. During the process of algae removal, proper oxygenation should be observed; regular replacement of fresh water should be performed each time. / 3 ~ 1/2 can be, at the same time pay attention to changing the water after the fertilizer, you can use Han Bao Xi; appropriate increase in oxygen time to remove harmful gases.
Other aquatic animals are too dense
In addition to farmed animals and plankton that are conducive to the growth of farmed animals, other organisms are wild animals that compete with resources for breeding and dissolved oxygen. However, when the amount of wild fish in the pool water is excessive, especially during the high temperature season, it is likely to cause aquaculture. Animal floating head.
Countermeasures: Reasonably arrange the stocking density; pay attention to increase the filter screen when changing the water in the pond to prevent the wild fish from entering the pool; regularly use disinfectant and antibacterial agents to prevent excessive zooplankton breeding.
Floating head caused by weather changes
During the aquaculture process, the dissolved oxygen and stratification of pool water is easily affected by weather changes, and changes in the water layer of the pond and drastic changes in dissolved oxygen are likely to cause the floating head of the farmed animals, sometimes leading to large-scale deaths. In the continuous cloudy and rainy days, if the phytoplankton is unable to carry out photosynthesis, it will also cause the pool to have insufficient dissolved oxygen and fish to float.
Countermeasures: In order to keep an eye on the changes in water-soluble oxygen in the pool, you should increase the number of pond-hunting times in the days of change, and open aerators or sprinkling oxygen-enhancing preparations in time to adjust; develop a good weather forecast, understand the good habits of the weather, and pay attention to rainy and hot weather , should be less or not bait.
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