The mangosteen pericarp juice has been used for medicine as it has antimicrobial agents. However, information of the use of mangosteen juice in fish is almost none. In culture fish, the attack of Aeromonas hydrophila causing the MAS disease that cause big lost. To understand the sensitivity of mangosteen pericarp juice on Aeromonas hydrophila growth, a study has been conducted from July to Octo…