How to solve the problem of fish culture in summer when the water quality deteriorates and fish grows slowly?

1. The water temperature is high in summer, the water body is stratified with the temperature, the bottom low temperature water, the dissolved oxygen is low, and the water quality is easy to deteriorate.

Countermeasures: control the depth of the fish pond, the water depth should be controlled at 1.2-1.5 meters, so that the water body can flow up and down by itself, and the anoxic zone at the bottom of the fish pond can be avoided. At noon on a sunny day, turn on more aerators to make the water convection up and down. When the water quality deteriorates, it shows that the high concentration of ammonia nitrogen or nitrite in the pond water can sprinkle low quality improver in the whole pond, reduce the content of organic matter, ammonia nitrogen and nitrite in the fish pond, and prolong the use time of the aerator.

Fish culture

two。 In summer, the water temperature is high, the digestion and absorption rate of fish is low, the growth slows down, the physiological metabolism is poor, and the anti-stress ability decreases.

Countermeasures: for fish ponds with inlet and drainage conditions, before or after turning on the aerator, add well water to the pond, while the other side of the fish pond overflows to discharge the upper high-temperature water. Unconditional fish pond, can introduce water hyacinth, duckweed and other upper aquatic plants, make it cover the water surface of 1 to 10, can reduce the water temperature. Change the feeding time of the fish to before 11:00 and after 4pm to avoid the high surface water temperature at noon.

3. Fish eat a large amount of food, some low-quality or containing bad substances and hormones are not conducive to fish culture.

Countermeasures: choose high-quality brand fish feed, add about 300 grams of vitamin C per ton of fish feed to protect fish liver, enhance physique, improve immunity and detoxification function. The amount of feed should not be too much, 80% full principle, in order to avoid oversatiety leading to indigestion and absorption of fish resulting in intestinal diseases.

4. Due to the high water temperature in summer, disinfection and insecticidal drugs have a great toxic effect on fish, which is easy to kill fish gills and cause fish death.

Countermeasures: the key to prevent fish disease in summer is to regulate the water quality and improve the bottom quality, mainly to improve and protect the environment. In the aspect of regulating the degree of water and fertilizer, mainly algal nutrients such as fertile water or fertilizer-water compound bacteria; in the prevention and treatment of diseases, avoid the use of toxic chemical drugs, it is appropriate to choose for the disease, such as bacteria and algae Jing and other environmentally friendly finished drugs.