High-quality and healthy seedlings are the premise and foundation of successful aquaculture production. "Raising half pond fish well" fully illustrates the importance of fry quality. Seedlings should have basically the same specifications, strong physique, normal body color, strong ability to swim against the current, and have not been cultivated with high temperature and antibiotics; Seed farms should be selected with large scale, good technology and good reputation.

The water body is polluted from outside. Generally, in the case of aquaculture, when there are pollution sources around the fish pond, the water body will naturally be polluted. Generally, water bodies are resistant, but the long-term harm of pollution sources will lead to the deterioration of water bodies and endanger aquatic organisms. Or in the case of aquaculture, the water body will be polluted due to incorrect disinfection operation. If you don't pay attention to the liquid fertilizer in time when feeding for a long time, it will lead to the loss of nutrients in the water due to consumption of fish, the decrease of zooplankton and microorganisms in the water, which will make the water thinner, the growth of fish will encounter various problems and the output will also decrease.

The self-regulating ability of water is due to the fact that microorganisms in water can produce substances beneficial to aquatic organisms according to their own life activities. Once microorganisms are out of balance, harmful microorganisms will lead to lack of oxygen in the water, and plants in the water will grow rapidly, resulting in red algae, green algae and cyanobacteria. It will hinder the growth of fish or suffocate fish due to lack of oxygen in water. Taking aquaculture as an example, fishermen are afraid that high temperature and heavy rain will dramatically change the water environment and lead to the transformation of water bodies. High temperature and heavy rain are the main culprits that lead to water hypoxia, cyanobacteria outbreak and fish suffocation.

There is no question about whether black pit fish and wild fish can be eaten. There may only be a question about whether they are delicious or not, or everyone is working. Where can we buy fish from the market and eat fish from the restaurant? In our daily life now, no matter vegetables or meat, snacks or fruits, some are not polluted, and some are without ingredients. We live in a polluted world, but we have different inner sensitivities and continue to live in bring disgrace to oneself. The real harm to our human body is invisible all the time, and it is a slow process that accumulates over time. If you should eat and drink, you should relax.