1.Every 10℃ increase in water temperature, drug toxicity increases 2-3 times.  

2.Biological agents are effective when used above 20℃.  

3.The amount of copper sulfate in summer and winter is very different.  

4.Water mildew in 18℃ above, melon worm disease in 26℃ above the disease can be controlled.  

5.If the water temperature is too high, the toxicity of drugs can be increased. If the water temperature is too low, it is difficult for drug treatment to take effect quickly. Usually, the dosage of drugs refers to the basic dosage when the water temperature is 20℃.  When the water temperature is as high as 25℃, the dosage should be reduced, and when the water temperature is less than 18℃, the dosage should be increased.  

Effect of dissolved oxygen on the efficacy of fishery drugs  

The lower the dissolved oxygen is, the more toxic the drug is to aquatic animals.  

The worse the effect when using biological agents or fertilizer water;  

The worse the effect of baits taken internally;  

The worse the effect of using water conditioner;  

Turn over the pond when using biological agents.

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