一要“试水”下塘。鱼苗放养前一天,取几尾鱼苗放在鱼池网箱中,观察6—8小时,若鱼苗活动正常,即可放苗。如发现鱼苗活动异常或出现死亡,则说明清塘药物毒性未完全消失,应待毒性完全消失后再放苗。 二要肥水下塘。肥水下塘的标准是,鱼苗入池时池塘中轮虫正处于繁殖高峰期,保证 A “test water” under the pond. Fry stocking the day before, take a few fish fry on the pond cage, observe 6-8 hours, if the fry activity is normal, can Fangmiao. If abnormal activity of fry or death occurs, then the toxicity of Qingtang medicine has not disappeared completely and should be re-released after the toxicity has completely disappeared. Second, to fertilizer under the pond. The standard of fertilizer under water ponds is that the rotifers in ponds are at the peak of breeding when the fry enters the pond,