Treatment methods for white spots on koi fish:

1. Quickly raise the water temperature to above 25°C, and sprinkle appropriate salt into the water to disinfect the water.

2. You can add appropriate amount of oxytetracycline into the tank to give the koi a medicated bath for 30 minutes every day. After 2 to 3 days of treatment, the white spots on the koi will gradually disappear.

3. Soak the new bricks in urine for 24 hours, take them out to dry, and put them in the tank of the koi carp with white spots. The effect will take effect in a few days.

4. Use 0.2-0.3 grams of mercury nitrate, dissolve it in 10 kilograms of water, and soak the koi with white spots for 10-15 minutes. Note that because mercury nitrate is highly toxic and corrosive, the solution It should be placed in a plastic basin, not a metal container.

5. Add an appropriate amount of methyl blue solution, 4-8cc per 10 gallons of water, in a container without bottom sand and a filter system. The dose should be reduced to one-half to one-quarter.