1. Reason: Koi fish scratch the skin in the process of transportation, or the breeding density is relatively high. They fight for space, and the skin is bitten, which will cause them to be injured. If the owner does not find the wound or finds that the wound is not treated in time, and the water quality is slightly worse, the wound will be infected by bacteria and suffer from Saprolegniasis.
2. Treatment method: immediately change the water body to ensure the water quality, and add oxytetracycline to disinfect the koi. At ordinary times, you can use your hands to hold up the koi and check it, and use oxytetracycline to diminish inflammation and disinfect the wound in time.
1. Reason: Koi carp is most suitable for living in the water temperature of 20-27 ℃, and can survive normally in the water temperature of 5-30 ℃. However, when the water temperature is lower than 5 ℃ or the water temperature fluctuates greatly, its resistance will decrease, the body's mucosa will lose its protection, and it is easy to be infected with Saprolegniasis.
2. Treatment: immediately raise the water temperature, and cover the insulation film or open the heating rod in time when the water temperature is low.
in salt water and methyl blue 1. Reason: Koi may carry mold when it is just bought, which may not be observed with the naked eye. If new fish with germs are allowed to enter the fish tank, the whole tank of Koi may be infected, and Saprolegniasis will break out in a few days.
2. Treatment method: soak in 1% -1.5% saline for 20 to 30 minutes, and soak in 2 ppm methyl blue for 10 to 20 minutes the next day. Persist for 3 days, and change water properly during treatment.
