Rizkia, A. A. and Husain, A. (2024) “Design Of A Monitoring System For Potential Of Hydrogen (Ph) In Fish Aquarium Water Based On ESP-32 Microcontroller ”, JESII: Journal of Elektronik Sistem InformasI, 2(1), pp. 189–199. doi: 10.31848/jesii.v2i1.3418.