Nitrite is mainly generated by decomposition of organic matter at the bottom of the pond under anoxic conditions. If it is solved, you can clean the bottom of the pool, change water and increase oxygen! Especially in the process of increasing oxygen, if it is not solved well, problems will occur repeatedly in the middle and late stage of breeding.

dissolved oxygen can not only provide breathing for cultured objects, but also promote the circulation of substances in pond water through oxidative decomposition of organic substances (such as feed residues, fish and shrimp feces, etc.).

Under the condition of sufficient dissolved oxygen, the toxic biological metabolite-ammonia is quickly absorbed by phytoplankton as a nutrient, and the toxic nitrite is quickly transformed into nontoxic nitrate, which will not accumulate to a toxic level.

On the contrary, under the condition of low dissolved oxygen or hypoxia, the circulation process of substances in water is destroyed, and the transformation of ammonia comes to a standstill. As a result, ammonia, a toxic substance, accumulates in the pool water and forms toxic ammonia nitrogen and nitrite. Even, it is possible to produce hydrogen sulfide which is more harmful to the breeding objects.

To solve this problem, we should try our best to improve the dissolved oxygen in water. Especially the dissolved oxygen in the bottom water. It is recommended that you use bottom filling aeration, that is, microporous pipe aeration. This model can effectively improve the dissolved oxygen in the bottom of the water body, so that the whole aquaculture water body can always be kept in an "aerobic" condition, and the organic matter such as aquatic excrement and residual feed can be decomposed. At the same time, under the action of up-and-down convection in the water body, toxic gases such as hydrogen sulfide and ammonia sulfide generated in the water body will escape from the water surface with the rise of bubbles, so as to maintain a good water environment and ensure the healthy growth of aquatic organisms.

The traditional mechanical oxygen-increasing machines, such as water wheel type, rotary wheel type and jet type, only partially increase oxygen on the water surface, so the effect is much worse.