一、鱼苗下塘前检查鱼池残留毒性。在鱼苗放养前1d,取几尾鱼苗放入池塘内的网箱中,观察1d,如鱼苗活动正常,即可放苗,如鱼苗活动异常或出现死亡,说明鱼池毒性未完全消失,暂时不能放苗。一般消塘后7d左右药效基本消失,药效消失后方可放苗。二、检查鱼池内敌害生物。在放养鱼苗前 First, the pond under the pond check before the toxicity of fish ponds. 1d before the fish stocking, take a few fish fry into the cage in the pond, observe 1d, such as fry activity is normal, can Fangmiao, such as fry abnormal activity or death, indicating fish pond toxicity has not completely disappeared, temporarily unable to put seedling. After the general disappearance of the pond after about 7d basically disappeared, efficacy disappeared before Fangmiao. Second, check the enemy pond creatures. In stocking fry before