一、对症选药准确选择药物是提高鱼病防治用药效果的关键，要避免抓错药，首先必须弄清用药目的，如：防病还是治病，防治何种鱼的何种病，等等。其次必须了解常用药物的功能与功效。另外，在用药前必须准确地估算养殖水体内的水量或某些相关鱼的总重量，以便选准药量。二、把 First, symptomatic drug selection Accurate selection of drugs is to improve the effectiveness of the prevention and treatment of fish disease, the key to avoid grasping the wrong drugs, we must first find out the purpose of medication, such as: disease prevention or treatment, what kind of disease prevention and treatment of fish disease, etc. . Second, we must understand the function and efficacy of commonly used drugs. In addition, before the medication must accurately estimate the amount of water in the breeding water or the total weight of some related fish in order to select the appropriate dose. Second, the