You know Why Plenty Of Fish Dead In River After Downpour !

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The main causes of fish deaths in ponds or river after heavy rainfall include:

1. Mechanical damage
A large amount of external water caused by heavy rain enters the fish pond, and the fish jump due to water activities, resulting in mechanical damage to the fish body, physical decline, and then infection with bacteria !

2. The stress response
The influence of rainfall on pond water body is all-round, including water temperature, pH value, dissolved oxygen, turbidity, salinity, total hardness, total alkalinity, ammonia nitrogen, salt and other physical and chemical indexes change rapidly in a short time. Only the change of water temperature is too large to cause intense stress in fish, if the temperature difference exceeds 3 ° C for an instant, sudden metabolic changes may lead to temperature shock or even death in fish !

3. Water body deteriorates
Rainwater is generally acidic, after the rain need to measure the ammonia nitrogen, nitrite and pH value of the water quality, if not treated in time, it is easy to exceed the standard, resulting in the death of fish !

4. Lack of oxygen over the pond or river
Rain is prone to the phenomenon of fish pond dumping algae, the oxygen at the bottom will be rapidly consumed, and the water body will be anoxic, which will hinder the growth of fish and even large-scale death !

5. Death by poisoning
Domestic sewage or the pesticide tail water of some farmland flows into the fish pond with the erosion of rain, and the fish are poisoned and killed !

6. Get sick and die
Rainy and humid weather is conducive to the proliferation of bacteria, causing bacterial infections in the fish, and diseases such as pickled skin and rotten tail, resulting in a large number of fish deaths !

All of these factors can cause fish to die after a rainstorm. Therefore, farmers should strengthen the management of fish ponds in the rainy season, including water quality care, oxygen, feed adjustment and other measures to reduce the death of fish caused by heavy rain !