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福尔马林对车轮虫、斜管虫有极强的杀灭能力,对鳜鱼苗种的安全浓度为2.04ppm.在网箱、孵化缸中的泼洒浓度为150～200ppm,池塘中为20ppm.试验结果表明:福尔马林对鳜鱼苗种车轮虫、斜管虫病的治疗效果好于硫酸铜、硫酸亚铁合剂及硫酸铜。
Formalin has a strong ability to kill rotifer and dipterocarpus and has a safe concentration of 2.04 ppm for anchovy fry, with a spill concentration of 150-200 ppm in the cages and 20 ppm in the pond. The results showed that the effect of formalin on the carps and carnotidoses of the catfish was better than that of copper sulfate, ferrous sulfate and copper sulfate.