Second, the reasonable stocking of scraping fish, such as fine scales and jaws, can remove the residual bait and part of sludge at the bottom of the pond, which plays a great role in stabilizing the water quality of the pond in the middle and late stage of culture.

Third, the rational use of oxygen-increasing equipment, the traditional oxygen-increasing machine should pay attention to "three on and two off." Bottom micropore aeration is a relatively new concept of aeration. The air compressor is used to compress and crush the air and then release it slowly and evenly from the bottom of the pond, which breaks the stratification of oxygen in the pond and greatly improves the aeration efficiency.

In addition, it is easy to ignore the pond compost in the early stage in the breeding process. Many farmers always think of fat water when the water quality is thin. At this time, fat water often takes time, and the water quality will not be stable for a long time. However, when fish enter Tangqian, composting with fermented feces is a good way to stabilize the fertility of water for a long time. Eupatorium adenophorum system is also a good way to regulate water quality. Specifically, no more than one-third of plants, such as water spinach, can strongly absorb ammonia nitrogen in water and can be sold as vegetables when they grow up, with good benefits.