Tilapia is one of the fish with high economic value because of the various advantages it has, such as a fast growth rate, good productivity level, and others. However, tilapia will be susceptible to disease, lose appetite, and have a body metabolism that easily declines when not properly cared for, the treatment in question is the use of good quality pond water and scheduled feeding, therefore, we need a tool that is capable
of control and automatically record the quality of pond water in the form of pH values, water temperature, water turbidity, and water levels, as well as feed fish automatically, this tool can control the pH of the water through the reading of the pH sensor 4502C and the solenoid valve actuator filled with acidic liquid and a solenoid valve filled with alkaline liquid, can control the water temperature through the DS18B20 sensor reading and the heater and drain pump actuator, control the turbidity of the water through the turbidity sensor readings and the fill pump and drain pump actuator, control the water level through the ultrasonic sensor and the fill pump actuator and drain pumps, as well as being able to perform automatic control is for feeding fish and control for recording sensor data using a data logger, the microcontroller used for this system uses Arduino Mega 2560 WiFi IoT and Arduino UNO, the resultsof this study are the system is able to control water quality parameters properly according to standards that have been set. determined, namely the pH value 6-8, the water level value 50 -60 cm, the water temperature value 25-32 ºC, the water turbidity value 1-10 NTU, the system is able to provide fish feed according to a predetermined schedule at 08:00:00 , 12:00:00, and 15:00:00, and the system is also capable of automatically recording water quality parameter data properly through the data logger feature.