Shrimp swimming pond may suggest how to prevent and cure the disease.

Shrimp swimming ponds are very common and can be roughly divided into six situations according to the causes:

Control of prawn swimming in pond

1. Lack of bait swimming pool: this situation can occur in the early, middle and later stages of shrimp culture, mostly because the lack of bait or poor quality causes shrimp to swim to the surface to look for food, showing a regular group swim. This situation occurred in the early stage, we should do a good job in the cultivation of basic bait or throw small particles of shrimp feed, occurred in the middle and later stage, should be fed in time, requiring strong food attraction, good palatability and comprehensive nutrition, so as not to weaken the physique of prawns or eat each other.

Second, the water clear swimming pool: did not do a good job of fertilizer and water work or a large number of noctilucent insects, resulting in excessive transparency, shrimp lying in the bottom of the pool without sense of security, resulting in swimming pool, such as frightened, easy to take off, group swimming. If the fertilizer and water work is not done well, the measures should be taken: ① change water properly to deepen the water level; ② sprinkles organic or inorganic fertilizer; ③ sprinkles photosynthetic bacteria and other microbial preparations.

Third, abnormal weather swimming pool: sudden change of weather, sudden change of physical and chemical factors of pond water, stimulation of shrimp leads to swimming pool. After rain, the bottom water is hot, the surface water is cool, the water body is layered, the bottom layer is lack of oxygen, shrimp swim in groups to the surface, most of them have a certain direction. At this time, you should start the aerator, mix the upper and lower layers of water well, then apply 0.2ppm chlorine dioxide, half a day later, add zeolite powder or wheat rice stone powder.

4. Anoxic swimming pool: in night and muggy weather, the dissolved oxygen in the pool water is low, which exceeds the tolerance range of prawns. Most prawns float and swim in the pool surface without direction, mostly for single swimming. Measures are adopted: ① starts the aerator to increase oxygen; ② changes fresh sea water; ③ plus oxygenator to carry out first aid.

Fifth, the bottom pollution swimming pool: aging shrimp ponds are more common, due to successive years of shrimp culture and not completely desilting, the bottom of the pond deposited too much residual bait and excreta, in the long-term hypoxia, produce ammonia nitrogen, hydrogen sulfide and other harmful substances, accumulate to a certain amount, affect the latent shrimp, thus swimming in the pool. This kind of swimming pool, there is no obvious regularity, there are both group tours and casual trips, both on the surface of the pool or in the water. The measures adopted are as follows: before releasing seedlings, ① should clear the silt and 10cm, and then expose to the sun for several days; ② usually starts the aeration machine to beat the bottom residual bait and excreta to the surface, so that the harmful substances are oxidized into non-toxic substances; ③ is sprinkled with zeolite powder, bentonite and other modifiers; ④ usually uses photosynthetic bacteria and other beneficial bacteria.

Sixth, shrimp disease swimming pool: shrimp infected with white spots, fluorescence, rotten gills and other diseases, can also cause swimming pool, in this case shrimp do slow swimming or crazy swimming on the water surface, more single swimming but not in groups, frightened without obvious reaction. This situation may be the precursor of a large number of shrimp disease, should be closely observed, careful examination of diseased shrimp, the right medicine after diagnosis, so as not to cause great harm.