Six reasons and countermeasures for prawn swimming in ponds

Shrimp swimming pond is a very common phenomenon in shrimp culture, which can be divided into the following six situations according to the causes.

First, lack of bait swimming pool

This situation can occur in the early, middle and later stages of shrimp culture. most of the reasons are that the lack of bait or the poor quality of the bait cause the shrimp upstream to ask for bait on the water surface, and the shrimp shows a regular group swim. If this situation occurs in the early stage, attention should be paid to the cultivation of basic bait or the feeding of small particles of prawns, which occurs in the middle and later stages, and should be fed with well-induced, palatable and nutritious compound bait in time, at the same time, maintenance and exemption can be added to the feed to promote feeding, so as to avoid the decline of shrimp physique or mutual cannibalism.

Second, clear the swimming pool

The reason for this kind of swimming pool is mainly caused by not doing a good job of fertilizer and water or the mass reproduction of noctilucent insects, resulting in excessive transparency, shrimp lying in the bottom of the pool without sense of security, shrimp is easy to take off, group swimming. If it is caused by not doing a good job of fertilizer and water, the measures that should be taken at this time are: 1, changing water properly and deepening the water level; 2, using ecological fertilizer and water ointment or Green Water No. 1 for fertilizer and water. If it is caused by too many noctilucent insects, add pool cleaning effervescent agent to kill noctilucent insects, and immediately fertilize the water body.

Third, abnormal weather swimming pool

Mainly due to the sudden change of the weather, the physical and chemical factors of the pond water changed sharply, and the shrimp was stimulated to swim in the pool. If it rains, it will cause the bottom water is hot, the surface water is cool, the water body is stratified, the bottom layer is lack of oxygen, shrimp swim to the surface after rain, most of them have a certain direction. At this time, we should start the aerator to stir the upper and lower water evenly, sprinkle the detoxification stress essence liquid in the whole pool, and then use Jin Wei'an to quantify the water in each bag of 6 mu rice two hours later.

4. Anoxic swimming pool

Occurs at night and muggy weather, when the dissolved oxygen in the pool water is low, which exceeds the tolerance range of shrimp, most of the shrimp floats and swims on the pool surface without a certain direction, and most of them swim alone. In this situation, the following measures can be taken: 1, start the aerator to increase oxygen; 2, change fresh sea water; 3, use coated oxygen for first aid.

Fifth, pool bottom deterioration swimming pool

This situation is generally common in aging shrimp ponds. Due to successive years of shrimp culture and failure to completely clear the silt, there are more residual bait and excreta at the bottom of the pond, which produces harmful substances such as ammonia nitrogen and hydrogen sulfide under the condition of long-term hypoxia. Accumulation to a certain extent is not conducive to shrimp latent, thus floating swimming pool, this kind of swimming pool has no obvious regularity, and there are both group swimming and wandering, which may exist in the pond surface or in the water. In this case, the following measures can be taken: 1, regular use of pond bottom clear and bottom living quick solution to improve pond bottom; 2, combined with the use of Bacillus, nitrification No. 1, casein freeze-drying agent to supplement the water body of beneficial bacteria, decompose too much organic matter.

Sixth, shrimp disease swimming pool.

Shrimp infected with white spots, red bodies, rotten gills and other diseases can also cause swimming pools, in this case shrimp do slow swimming or crazy swimming on the water surface, more single swimming but not in groups, shrimp frightened without obvious reaction, encounter this situation may be a precursor of a large number of shrimp disease, should be close observation, careful examination of diseased shrimp, prescribe medicine to the case after diagnosis, so as to avoid greater harm.