1. Reason: When bacteria, viruses or parasites in water infect koi fish, causing them to suffer from hemorrhagic disease, red blood streaks will appear on their bodies.
2. Treatment: First, isolate the diseased fish to prevent them from infecting other fish. Then smear red blood streaks on koi with mercurochrome, and then take out the sick fish and soak them. After a day, they are smeared with mercurochrome, and they can recover after almost a week. Or put a small amount of furacilin in the water to take a medicated bath.
2. The water quality is too poor1. Reason: Often not changing water or feeding too much will lead to poor water quality. At this time, the water body will be eutrophic, and algae and germs in the water will multiply in large numbers. When they multiply to a certain number, they will infect koi, causing koi to get sick. At this time, we can see that some koi have red blood streaks.
2. Treatment method: First, pour out the water in the tank to clean the fish tank, replace one quarter of the water in the fish tank, and ensure that the water quality of the newly added water is not much different from that of the previous water. Secondly, in daily feeding, it is necessary to ensure that the feeding amount is not too much to avoid eutrophication of water body.
3. The temperature difference is too large1. Reason: When day and night alternate or seasons alternate, the temperature in water will change too much. When the temperature changes too much, their body resistance will decrease, which will easily make them feel uncomfortable.
2. Treatment method: First, put a heating rod in the fish tank and adjust the water temperature to about 28 ℃. Then add a certain amount of crude salt to the water to disinfect the fish tanks to prevent them from getting sick.