White spot disease. The whole body of the ear spot hanging seems to be covered with a white film, the mucus is increased, the body color is dull, the fish body is thin, loses vitality, and the swimming is slow, often sluggish. Or floating on the water, or living in a group, loss of appetite, accompanied by bleeding spots on the body, and likes to rub and itch on aquatic plants, fish tanks, etc.

Treatment method: 5~8 parts of table salt can be sprinkled into it In the tank, and raise the temperature to above 28 degrees, or soak it with two parts per million (2ppm) mercurous nitrate solution for 30 minutes.