Hypoxic shrimp has four precautions to avoid loss
It is of great significance how to be able to know what to do and what to do to prevent shrimp from deprivation of swimming pools, stealing, or even outbreaks of diseases. Here are some aspects of oxygen-deficient precursors:
Look at the color of the water according to the water bloom, transparency, turbidity, and moisture levels, and predict whether the water is deteriorating and lacks oxygen. The blooms of cyanobacteria (Microcystis, Oscillatoria, etc.) and flagellates (cryptophytes, Euglenophyta, etc.) are likely to cause water layer. During the day, the algae produce more oxygen on the surface. If there is no aerator stirring, oxygen is very difficult. Diffusion into the lower layers of the water, so at night easy to lack of oxygen; lower transparency, light depth is shallow, easy to form thermocline (above the water heat, the following water is cool), if there is no aeration machine stirring, oxygen is difficult Diffusion into the lower layers of the water, so it is prone to lack of oxygen at night; high turbidity (such as sediment or organic particles), also affect the light; moisture layer (pointed to open aerator water turbidity, stop the aerator after the water becomes better ) Most of them are organic particles suspended in water. Due to the lack of dissolved oxygen in the water, even the bacteria are slowly decomposed. Therefore, inexperienced farmers who simply use bacteria to treat this water will often cause turbidity in the whole pond.
Measuring the pH change of the water quality, ammonia nitrogen and nitrite are very important indicators of water quality. The day's change in pH and the trend over the days clearly tell us the growth of the algae. For example, one day (at 7:00 in the morning and at 13:00 in the afternoon) when the pH value changes more than 0.6, and the pH value goes up for a few days, indicating that the algae grows vigorously or there are many small algae, pay attention to the nutrition needed for the algae (N and C) Conversely, algae are known to have deteriorated oxygen production capacity. Ammonia nitrogen or nitrite is high, indicating that the water body is unbalanced in nutrients (N is less than C), algae are easy to age, the water color is darkened, and the oxygen production capacity is reduced.
Observe the material table to see how fast the food is eaten, whether there is silt, and the shape and color of the feces. In general, eating slowly, the lifting table feels heavy, sticky dirt on the rope, mud on the material table, long feces, darker color, indicating that the body of dissolved oxygen is not enough, for a long time, shrimp easily slow Anorexia, followed by onset.
Inspect the shrimp body regularly to observe the shrimp body, see the shrimp eye, swimming feet (climbing claws), step foot (forepaws), shrimp whiskers, tail fan, hepatopancreas and other organ color changes, most appear yellow or red The phenomenon. Feel the hardness of the shrimp shell, look at the color and gloss of shrimp shell, if the shrimp shell is very hard or soft, it may be caused by lack of oxygen and shelling is not or not hard shell; shrimp shell yellow, more pigment spots on the shell, also It may be due to lack of oxygen.
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