一些养鱼者对养殖环境不是不消毒，就是盲目消毒，从而导致鱼病严重发生，轻者影响鱼类生长，重者造成鱼儿死亡，损失很大。对池塘消毒进行“四改”，可有效地防止鱼病发生，促进鱼儿健康快长，从而大大提高鱼产量。 　　一、改不排水消毒为排水消毒。将池塘内的水排干后进行 Some fish farmers on the aquaculture environment is not non-disinfectant, is blind disinfection, resulting in serious fish disease, the light affect the fish growth, severe cases caused the death of the fish, a great loss. The “four changes” to the pond disinfection can effectively prevent the occurrence of fish diseases and promote the fast and healthy growth of the fish, thereby greatly increasing the fish production. First, to change drainage and disinfection for drainage disinfection. Dry the water in the pond