What are the reasons for the winter and summer fish death? Provide a plan of actions to prevent them.

The cause of winter frost is the icing of the water surface, when oxygen deficiency appears. The cause of summer frosts is the high water temperature, which reduces the solubility of oxygen and increases its absorption by bottom sediments. Also, the cause of deaths can be an increase in the concentration of toxic gases formed during the decomposition of dead organisms.
To prevent winter frosts, you need to monitor the oxygen content in the water after the formation of ice and before it melts. With a decrease in oxygen concentration, it is necessary to equip ice holes and lanes, to clear the ice field from snow. To prevent summer frost, the reservoir should be protected from the discharge of organic and other substances into it that absorb oxygen from the water.

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