Will the fish have radiation when the mobile phone falls into the fish pond?

Yes, there is metal in the mobile phone.

With the decrease of water temperature, the feeding intensity of fish is greatly reduced, and the growth rate is also slowed down, and most fish meet the fishing standards. At this time, fish farmers should pay attention to the preparation of mending nets, overhauling transportation tools and investigating market sales, catch conventional fish such as bighead carp, carp, silver carp, crucian carp, grass carp and herring in time, and seize the time to go on the market for sale.

In winter, due to the low water level in ponds, most ponds are empty and there are no fish, which is a good time to dredge, repair and transform the aging ponds. The method of dredging is to drain the pond water first, and then dry the pond in frozen soil after manual or mechanical dredging. Ponds with better conditions must also be repaired and rebuilt. The water in the pond can be drained, and the thick silt can be dug out to expose the bottom of the pond to the sun.

This can not only kill pathogens and wild fish in sludge, but also promote the improvement of pond bottom. At the same time, weeds should be eradicated and ponds should be heightened and reinforced. The reformed pond can not only increase the water capacity of the pond, but also improve the production conditions of the pond and greatly improve the production potential of the pond.

Pond disinfection

The renovated pond should be disinfected with drugs. Commonly used disinfection drugs include bleaching powder, Qingtangling and quicklime, among which quicklime has the best disinfection effect. Disinfection of the pond should be carried out in sunny days, and the water depth of the pond should be kept at about 10 cm. After using 50 ~ 80 kg of quicklime per mu of water, the whole pond should be splashed.

Overwintering in parallel ponds

In order to facilitate the daily management in winter, conventional fry should be incorporated into the pond. The combined water temperature of fish ponds is generally 8℃ ~ 10℃. In Tang Qian, the fish should be trained 1 ~ 2 times, and the pulling action should be brisk, so as to avoid the fish from being injured and to prevent the fish from being infected with various body surface infectious diseases after going into the pond. Under normal circumstances, 20,000 to 30,000 fish with a body length of 10 ~ 12cm can be stocked per mu of water surface.