硫酸铜、硫酸亚铁、漂白粉、敌百虫、高锰酸钾等都是防治鱼病的常用药。为提高用药效果，须注意以下事项：１．要注意用药量 如用药量过多，会对鱼及水质造成危害；用药量不足，则达不到防治鱼病的效果。因此，用药量一定要适量。如漂白粉的用量，应根据含氯量３０％计算。如漂 Copper sulfate, ferrous sulfate, bleach, trichlorfon, potassium permanganate are all commonly used drugs for the prevention and treatment of fish diseases. To improve the effect of medication, we must note the following: 1. Should pay attention to the amount of medication, such as excessive dosage, will fish and water hazards; lack of medication, then the effect of preventing and curing fish diseases. Therefore, the amount of medication must be appropriate. Such as the amount of bleaching powder, chlorine content should be based on 30% calculation. Such as drift