for white spots on fish? White spots on fish are symptoms of white spot disease. White spot disease is caused by Ichthyophthirius invading the skin or gills of fish. White spot disease is infectious and epidemic. The main cause is that the temperature in the fish tank is low or the water temperature changes suddenly, such as seasonal alternation, the difference between the new water and the old water temperature is too large, which may lead to white spot disease. This disease often occurs in the rainy season of spring and autumn, and spreads rapidly. In the early stage of the disease, white spots will grow on the pectoral fin, dorsal fin and skin. Although sick fish can feed normally, they often rub hard objects with their bodies. In the later stages of the disease, they are unable to eat normally and will soon die.
if there are white spots on the fish? 1. Isolation: The white spot disease is infectious, and the sick fish should be isolated and fed immediately after the disease is found. The water temperature should be 2 to 3 degrees higher than the raw water, and the water temperature should be maintained during the treatment. Because Ichthyophthirius is not resistant to high temperature, it will stop developing when the water temperature is above 25 degrees, and it will die naturally when the water temperature is between 28 and 30 degrees.
2. In the early and middle stages, 1 ~ 5 ppm furacilin powder can be used to sprinkle the whole jar, or methyl blue liquid medicine can be put into the water for treatment.
3. In the middle and late stages, 2 ppm mercurous nitrate or 0.5 ppm malachite green solution can be used to soak the diseased fish for about 2-3 hours. Water should be changed immediately after the symptoms of diseased fish disappear, so as to avoid mercury poisoning caused by fish staying in the water for too long.
