pH is highly important in water aquaculture as it affects fish growth rate and health. Maintaining optimal pH conditions is crucial for freshwater habitats. Water quality is a key factor in the success of aquaculture operations, and pH plays a significant role in determining the productivity of the production system. The pH value of water is an intensity factor that can influence the biological processes of fish, including growth, survival, reproductive performance, and embryology. Monitoring and controlling pH levels in aquaculture water is essential for maintaining optimum conditions for aquatic animals. The invention of pH value detection devices and methods for aquaculture water has helped overcome challenges such as pH meter scaling and fungus growth. Understanding the importance of pH in water aquaculture is crucial for ensuring the success and well-being of aquatic animals.