From July to September in summer, although the temperature is high, the water temperature is suitable for the growth of fish, which is the peak season for the growth of fish, but also the high incidence of fish disease, so we should not only pay attention to feeding, but also to the prevention and control of fish disease:

1.    Throw the bait scientifically.
Fixed time: Adhere to the timing of feeding every day. Generally, it should be at 9 to 10 am. or 2 to 3 pm. To strictly control the time,feeding before fish float. 
Fixed position: the best bait casting should be fed in a fixed place, if conditions are available, fixed feeding table can be set up, in order to observe the feeding situation of fish, feeding appropriate bait.
Steady quality: feed bait should be fresh, avoid feeding moldy bait. Bait quality should be relatively stable, so as not to affect fish appetite. In the bait variety should adhere to the combination of coarse and coarse, coarse instead of fine, grass fish, reduce the cost.
Fixed quantity: the amount of bait to be relatively stable, generally can be determined according to the total amount of fish pool bait.

2. Fish disease prevention and control.
Commonly used preventive disinfection drugs are: (1) quick lime. Generally, 15 kilograms of quicklime is used for each meter of water depth per mu, and the whole pool is sprinkled after water is added. (2) Bleaching powder. Each mu each meter of water depth with 0.75kg of bleaching powder, add water to the whole pool sprinkling.
These drugs can be used interchangeably. 3 ~ 4 PM is the appropriate time to use, but attention should be paid to fish floating head must not be used. Because the floating head is in the period of hypoxia in the pond, at this time the drug will increase the concentration of the pool water, accelerate the death of fish asphyxiation. To improve water quality, rely on the physicochemical effect of quicklime in the pond, quickly raise pH value, neutralize acidity, clarify water quality, and play the role of bleaching powder insecticidal sterilization.

3.Patrol the pond in the morning and evening.
In midsummer, there are many hot and humid thunderstorms, and fish often lose oxygen and float because the water is too fat and the weather is sultry. If you do not pay attention to it, it will cause dead fish in the pond. Fish float head has weight points, generally in the morning float head is light head, midnight start float head heavy float head; Floating head in the middle of the pond is light, and floating head at the edge of the pond is heavy. Hear the sound of the sinking for the floating head, not sinking heavy floating head. If serious floating head is found, oxygen increasing measures should be taken immediately, and if there is no oxygen increasing equipment, new water should be injected immediately to alleviate the problem.

4.Catch and release in turn.
In order to increase the yield and benefit of adult fish, it is necessary to do a good job of round catching and round releasing. First of all, it is necessary to control the amount of fish in the pond. When it exceeds or reaches a certain number, it is necessary to carry out round catching and round releasing. Fishing is best in the early morning when the fish are not floating head, fishing action to be fast, fast catch fast release, catch big leave small. After catching, a certain number of fish should be put in time to lay a good foundation for adult fish production next year.