Dissolved oxygen in water can become an important index of water quality detection by water quality online analyzer, because dissolved oxygen is of decisive significance to aquaculture. It is an indispensable condition for aquatic organisms to survive in water, and aquaculture industry is also the most afraid of anoxia in aquaculture water bodies.

For aquaculture, the lack of dissolved oxygen in water bodies can bring aquaculture risks and economic losses, because once the water is deprived of oxygen, it will produce excessive harmful bacteria, ammonia nitrogen, nitrite, hydrogen sulfide, resulting in slow growth of fish and shrimp, death and even disease outbreaks. In the face of this huge aquaculture risk, how to correctly avoid is very important, and the correct way to avoid is to use water quality monitoring equipment to monitor the water quality, through the monitored data to analyze the dissolved oxygen in the aquaculture water, if the dissolved oxygen content is too small, you can make a reasonable response before this. In general, the dissolved oxygen in the cultured water should be kept at 5-8 mg per liter and at least 4 mg per liter. The effects of dissolved oxygen in water on aquaculture can also be divided into two types, namely acute effects and chronic effects. Under acute effects, low oxygen conditions will make the asphyxiation point of fish and shrimp with strong activity and high oxygen consumption rate become higher. When dissolved oxygen in water is too low, fish and shrimp will swim to the surface of the water, and in severe cases, they will swallow air on the surface to produce floating head phenomenon, and even suffocate, resulting in breeding failure and economic loss. And under chronic influence. Although the dissolved oxygen does not reach the asphyxiation point, the water body under the condition of low oxygen is very unfavorable to the growth and reproduction of aquatic products, which will lead to slow growth, low weight gain rate and low utilization rate of food, increased incidence, and easy to induce diseases. Therefore, when the detection of water quality analyzer finds that the aquaculture water body has acute or chronic effects, it is not necessary to blindly improve the dissolved oxygen of the water body at a loss. In fact, there are five measures to increase and improve the dissolved oxygen status of the pond:

· Maintain the appropriate area and water depth, wind-blown pool water can produce moderate waves, increase dissolved oxygen, and prevent the bottom of the pond from hypoxia;

· When the dissolved oxygen in the pool water is too low, foreign water with high dissolved oxygen should be introduced in time, such as river water and reservoir water;

· Equipped with aerator, turn on oxygen in time when hypoxia;

· Increase pond light and maintain appropriate amount of phytoplankton;

· Oxygenating agents can be used when appropriate;

· To ensure the normal growth of aquaculture is the premise and basis for the operation of aquaculture industry. The monitoring of dissolved oxygen in aquaculture water by water quality analyzeris an important guarantee for aquaculture to avoid risks.