The goldfish are all dead. How to clean and disinfect the fish tank?

It should be soaked in potassium permanganate for half an hour, then washed with clear water, soaked in sea salt water for one day to dry, and then it will be all right.

All deaths are water quality problems, and water needs to be improved again.

The water for normal fish farming is tap water that is put in pots or barrels and kept indoors for 3-5 days, commonly known as trapped water. Then use a heating rod to heat it to the same temperature as in the fish tank, and then change the water.

Remember to add the trapped water into the empty cylinder, then add the killing bacteria, generally pour it on the filter cotton, and then turn on the circulating pump and heating rod for normal circulation for about two days to observe whether the water is clear and transparent, which indicates that the nitrification system has been established. At this time, the bought fish will be poured into the fish tank. Then add an appropriate amount of special sea salt for fish farming.

In the future, the trapped water should be replaced every time the water is changed, and nitrifying bacteria should be added every half month to ensure the water quality. This is basically enough.