Why is it risky to close the cylinder in winter in koi fish?

The reason for the high risk of tank closing in winter in koi fish is that snails in different tanks are different at the end of winter, and tank closing is easy to cause cross infection and kill fish.

1. When new fish enter in winter, it's best to isolate them for a period of time before closing the tank. Because the water temperature in the fishing ground is generally low in winter, it is also in a low temperature environment during transportation, and the bacteria in the fish are dormant.

2. In winter, the water temperature suddenly rises, and a large number of bacteria begin to multiply actively. Coupled with transportation and environmental changes, the fish's own resistance decreases and the immune system is weak, so bacteria will multiply in the fish and cause cross infection.

3. Confirm whether there is any problem with the next two tanks of fish before closing the tank. Feeding was stopped the day before, and disinfectant and chlorine dioxide were used once for each of the two tanks. Disinfect the fish with potassium permanganate or coarse salt when closing the cylinder. The concentration can be determined according to the size and age of the fish, and individual concentrations can be slightly higher.

4. After disinfection, it can be put into the jar. After closing the pool, disinfect the whole pool once with potassium permanganate at night, with a concentration of 2-3g per ton of water. The next day, VC will be used to dissolve the sewage side by side. If potassium permanganate is not used, you can also use about three thousandths to five thousandths of raw salt for the whole cylinder.