"Spring rain is as expensive as oil." It is reasonable to say that there should be relatively little rain in spring, but it can be connected with warming and cooling. It is necessary to pay attention to white shrimp farmers in South America.
First, what is "bottom algae" and its harm
In the spring and rainy days in spring, the lack of dissolved oxygen in the water and the weakening of photosynthesis resulted in the death of a large number of single-cell beneficial algae. This is commonly known as “cold algaeâ€, which means that algae in aquaculture waters have been largely or completely dead, causing water to abruptly Change, become turbid or even blackish. The harm is easy to cause white prawn soft shell disease, vibriosis, etc., and even lead to white shrimp poisoning, death and so on.
Second, the spring "bottom algae" prevention and control measures
1. Pay close attention to changes in the weather and start the oxygen aerator in advance to ensure adequate dissolved oxygen in the water.
2. Regulate water quality before raining, stabilize pH of water body, increase algae vitality in water and prevent “cold algaeâ€. At the same time, anti-stress fishery drugs are used to help white shrimp adapt to the osmotic pressure of water bodies in rainy days.
3. When it turns cloudy after rain, first antibacterial, detoxification, change the bottom, to prevent the algae rain caused by the violent increase in pH value after the sudden increase, the use of slaked lime to increase the total alkalinity and stabilize the pH value the next day to prevent the pan bottom; Then, according to the algae activity, the algae can be properly activated to prolong the cycle of vigorous algae growth.
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