Fira Yuniar, Patang, Andi Alamsyah Rivai and Subariyanto 2023. Effect of Addition of Betel Leaf Extract (Piper betle) on Feed for the Treatment of Tilapia (Oreochromis niloticus) Infected with Aeromonas hydrophila. The International Journal of Science & Technoledge. 11, 2 (Feb. 2023). DOI:https://doi.org/10.24940/theijst/2023/v11/i2/ST2302-002.