The rotten tail of tropical fish may be caused by the following four reasons:

1. Water quality problem: It may be that the owner does not change the water regularly, resulting in poor water quality.

2. Caused by bacterial infection: It may be caused by improper mixing and mixing, causing the tail to be bitten by other fish, which will continue to lead to tail rot.

3. Cause of water temperature: It may be a sudden change in water temperature, which causes tropical fish to become sick and their resistance decreases, leading to tail rot.

4. Tail-scalding disease: Sunlight in summer will cause the water temperature in the tank to be high, and the photosynthesis of algae and aquatic plants in the water will be strong, saturating the dissolved oxygen in the water, and bubbles will be produced. It will stick to the tail during swimming, and the fish will float on the water. When exposed to the sun, the tail fin tissue will be burned.

When the owner discovers that the tail of a tropical fish is rotten, he should immediately isolate the sick fish, then change the water, increase the water temperature appropriately, and sprinkle Use an appropriate amount of coarse salt for disinfection and sterilization. During this period, pay attention to oxygen explosion in Jining to prevent the tropical fish from hypoxia and suffocation. If the condition is serious, you need to use corresponding drugs.