Rancang Bangun Alat Pengendali Kualitas PH Air Dengan Menggunakan Sensor PH SEN0161 Pada Kolam Ikan Berbasis Mikrokontroler Arduino Nano

Fish farming is a crucial sector in Indonesia's fisheries industry, holding significant potential for boosting the national economy. Water quality plays a key role in determining the success of fish farming, with factors like water pH directly impacting the health, growth, and productivity of fish, particularly catfish. Maintaining optimal water quality is essential for reducing disease risk, improving growth rates, and ensuring successful harvests. Unstable pH conditions can lead to disease, stress, and even death in fish, which can result in reduced yields. This research aims to design and build an automatic water pH control device for fish ponds using a SEN0161 pH sensor integrated with an Arduino Nano microcontroller. The research methodology involves the integration of the SEN0161 pH sensor and an Arduino Nano microcontroller as the controller, along with DC motor pumps that add either pH Up or pH Down solutions. Device testing was conducted by intentionally disturbing the pond water's pH. The test results demonstrate that the designed device functions well and is effective in maintaining water pH stability. The SEN0161 pH sensor exhibits good accuracy, with an average error ranging from approximately 1.51% to 1.55%. When the water's pH drops below 6.5, the pH Up pump automatically activates. Conversely, if the pH rises above 7.5, the pH Down pump engages. Based on these findings, the water pH control device operates effectively and successfully stabilizes water pH within the designated neutral range. Therefore, the design and construction of this automatic water pH control device offer an innovative solution for maintaining fish pond water quality, potentially enhancing the quality of fish harvests.