White spot disease. The whole body of zebra shellfish seems to be covered with a white film, with increased mucus, dull body color, thin fish body, loss of vitality, slow swimming, and 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.

Sprinkle 5~8 parts of table salt into the tank, and put The temperature was raised to above 28°C. Soak in red mercury solution with a concentration of 50 to 70 parts per million (50 to 70 ppm) for 5 to 15 minutes, twice a day.