DEVELOPMENT OF A SECURED BLOCKCHAIN-BASED INTERNET-OF-THINGS SMART WATER QUALITY MONITORING SYSTEMFOR FISH FARMING

Abstract

Effective water quality management is vital for sustainable aquaculture, yet manual monitoring is labor-intensive, error-prone, and slow to detect rapid environmental changes. In this study an Internet of Things–based smart water quality monitoring system for fish farming was developed. pH, temperature, dissolved oxygen, turbidity, and water-level sensors interface with an Arduino and Wi-Fi module to stream real-time data to a Firebase cloud database. A web dashboard built with HTML5, CSS3, and JavaScript enables live visualization, trend analysis, and instant parameter-deviation alerts. Blockchain ensures tamper-proof data sharing with stakeholders. Automated control of pumps and solenoid valves maintains optimal conditions, while a solar power supply supports off-grid operation. The result obtained demonstrated 98 % operational reliability, accurate sensing, and effective automated water-quality correction. The system offers a cost-effective, scalable solution that improves fish health, reduces labor, and enhances aquaculture productivity. It improves production, enhance food security, and create employment, demonstrating a scalable model for resilient aquaculture.