The best yellow powder is Ueno yellow powder from Japan, and its main components are furacilin and furatazine.
Can be used for treating carrion and adjuvant treatment of intestinal diseases.
It is worth mentioning that, in addition to furacilin, yellow powder also contains a component called furatase, which is a powerful bactericide with strong antibacterial effect, and its antibacterial effect on fish pathogens such as Vibrio and Aeromonas hydrophila (fish enteritis and ascites are closely related to this bacterium) is stronger than that of furazolidone or tetracycline 10-30 times.
Usually oxytetracycline combined with yellow powder can treat most fish diseases. It should be a standing medicine for all fish friends.