This study presents a smart aquaponics system with an automated water quality management system for sustainable urban agriculture. The system integrates a literature review and controlled experiments to enhance aquaponic performance. A PID control system was developed and tested to manage water quality in fish and vegetable tanks, as well as a heater system. The optimal controller parameters for the vegetable tank were 4,706,691,503 and -174.418, for the fish tank 36,167,000 and -174.418, and for the heater system 4.761, 0.0488, and -31.88. The system uses sensors and actuators integrated with a microcontroller to monitor and control water quality parameters such as pH, temperature, turbidity, and total dissolved solids. The system also includes a Wi-Fi-enabled control module for remote monitoring and adjustment. The system was designed to maintain optimal conditions for fish and plants, ensuring stable and efficient aquaponic operations. The results show that the PID control system effectively reduced errors and improved system stability. The study highlights the importance of water management in aquaponics and the potential of advanced control systems to enhance sustainability and productivity in urban agriculture. The proposed system demonstrates a comprehensive approach to aquaponic management, combining literature review with practical experimentation to address key challenges in water quality control. The integration of PID control represents a significant advancement in environmental control, enabling precise and responsive management of aquaponic systems. The system is expected to provide stable and efficient performance, contributing to the development of sustainable urban agriculture.This study presents a smart aquaponics system with an automated water quality management system for sustainable urban agriculture. The system integrates a literature review and controlled experiments to enhance aquaponic performance. A PID control system was developed and tested to manage water quality in fish and vegetable tanks, as well as a heater system. The optimal controller parameters for the vegetable tank were 4,706,691,503 and -174.418, for the fish tank 36,167,000 and -174.418, and for the heater system 4.761, 0.0488, and -31.88. The system uses sensors and actuators integrated with a microcontroller to monitor and control water quality parameters such as pH, temperature, turbidity, and total dissolved solids. The system also includes a Wi-Fi-enabled control module for remote monitoring and adjustment. The system was designed to maintain optimal conditions for fish and plants, ensuring stable and efficient aquaponic operations. The results show that the PID control system effectively reduced errors and improved system stability. The study highlights the importance of water management in aquaponics and the potential of advanced control systems to enhance sustainability and productivity in urban agriculture. The proposed system demonstrates a comprehensive approach to aquaponic management, combining literature review with practical experimentation to address key challenges in water quality control. The integration of PID control represents a significant advancement in environmental control, enabling precise and responsive management of aquaponic systems. The system is expected to provide stable and efficient performance, contributing to the development of sustainable urban agriculture.