ABSTRACT Citrus hystrix is an essential oil producing plant. In addition to essential oils, there are several ingredients of Citrus hystrix as an antibacterial agent, namely: vitamin C, flavonoids, tannins and alkaloids. This research was conducted on June until August 2019. The aims of this research was to get the best dose of immersed of Pangasius hypophthalmus with a solution of Citrus hyst…