Manifestation: The early manifestation is not obvious, and it needs careful observation to find that yellow spots will appear on fins, bodies and other places (similar to white spot disease, all of which are emitted). If not treated in time, there will be more and more yellow spots on the fish until it spreads all over the body, leading to shortness of breath and refusal to eat until death.

Cause of disease: the water body is old, which is easy to cause if it is not changed frequently, and the water temperature often changes suddenly, and the conflict of fish flora in different areas can also lead to (such as bacterial pollution of south fish and north fish)

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Treatment method: raise the temperature to 28 ~ 30℃ and explode oxygen, with the lowest drop of 2000.

On the first day, drop 40 drops (about 2ml) every 100L underwater, and stop eating.

The next day, stop giving medicine. If the density of fish in the fish tank is high, feed a small amount of food. If the fish obviously refuses to eat, suck it out in time. If the density is low, there is no need for feed.

On the third day, dive 20 drops (about 1ml) every 100L, and stop eating.

On the fourth day, stop giving medicine. If the density of fish in the fish tank is high, feed a small amount of food. If the fish obviously refuses to eat, suck it out in time. If the density is low, there is no need for feed.

On the fifth day, dive 20 drops (about 1ml) every 100L, and stop eating.

On the sixth day, stop giving medicine. If the density of fish in the fish tank is high, feed a small amount of food. If the fish obviously refuses to eat, suck it out in time. If the density is low, there is no need for feed.

On the seventh day, stop dosing and change the water to 1/3. Note that the temperature of the replaced water must be as consistent as possible with the temperature of the original cylinder, and slowly drip into the cylinder. Hey, one course of treatment is over.

Note: If the condition is not very serious, there should be obvious effect (yellow spots fade) from the third day to the fifth day. If the condition is serious, it has not recovered or improved after a course of treatment. Keep observation on the eighth and ninth days and eat a little. If you refuse to eat, suck it out in time and don't change the water. Still not recovered on the tenth day, repeat a course of treatment. During the treatment period, the fry below 4 cm lost seriously in the early stage, and the fish with large size hardly lost; The loss of post-treatment is quite heavy. The main component of most 2000 is copper sulfate, which will cause the death of nitrifying bacteria in the tank. If nitrifying bacteria are stable, it won't have much impact. If nitrifying bacteria are fragile, they can be added in time after treatment, such as Cody and Bond, and the effect is obvious. After recovery, keep the water temperature within 15 days to prevent the parasite from recurring, and gradually cool down to the optimal temperature after 15 days (personally, 24 ~ 25 is the best).