What should I pay attention to when raising fish in hot weather?

First, pay attention to cooling measures. The climate is hot. If fish are allowed to grow under the exposed pond for a long time, most cultured species will reach the upper limit of suitable water temperature, and their anti-stress ability will decrease, and the culture effect will definitely be unsatisfactory. 1, water hyacinth, duckweed and other upper aquatic plants can be introduced to cover the water surface of110, so as to prevent direct sunlight from reaching the whole pool and reduce the water temperature. 2. Change the feeding time before 1 1 am and after 4 pm to avoid the time when the surface water temperature is high at noon. 3. Add fresh water and continuously raise the water level. The water level in the fish pond should be deepened to more than 2 meters.

Second, pay attention to regulating water quality. In the high temperature stage, due to the large amount of feeding and the waste of fish, it is easy to cause the deterioration of water quality and the lack of oxygen in the pool water. 1, control the depth of the pool water, control the pool water at about 1.5 ~ 2 meters, and open more aerators at noon on sunny days to promote the up-and-down convection of the pool water and avoid the anoxic area at the bottom. 2. Replace the old water in the pool regularly and replenish the new water in time. Generally, change 1 water every 5 ~ 7 days, drain it before adding it, and change 10 ~ 15cm at a time. 3. When the water quality deteriorates, for example, when the concentration of ammonia nitrogen or nitrite in the water is high, the bottom improver or photosynthetic bacteria can be used to spray the whole pool to reduce the contents of organic matter, ammonia nitrogen and nitrite in the water and prolong the service life of the aerator. 4. When excessive nutrients in the water lead to a large number of algae, properly remove algae to clean the water surface, and use a filter to remove algae. The filter screen needs to be disassembled and cleaned frequently. Or throw some chemicals to inhibit algae reproduction. At present, the popular chemical methods in the market are mainly sodium hypochlorite and copper sulfate.

Third, rational use of aerators. Using an aerator is one of the technical measures to increase dissolved oxygen in water and prevent fish from floating. 1. If a small amount of fish floats in the fish pond, start the aerator around midnight before the fish floats, and continue to start it until the sun comes out. 2. In rainy days, it can be opened at 3-5 am the next day until sunrise in the east. For fish ponds with plenty of water and dense fish, the start-up time should be appropriately advanced. 3. In order to break the hot water layer, it usually starts at about 2 pm, and the starting time is 1.5 ~ 2.5 hours.