Water quality management in pond fish culture is essential for ensuring the health and productivity of fish. The report discusses the relationships between water quality variables and fish production, focusing on factors such as temperature, salinity, turbidity, plankton, dissolved oxygen, pH, carbon dioxide, ammonia, hydrogen sulfide, total alkalinity, and total hardness. It also covers management techniques for maintaining good water quality, including the use of inorganic and organic fertilizers, liming, and the removal of clay turbidity. Water analysis methods, such as Secchi disk visibility, are also discussed. The report emphasizes the importance of monitoring and managing water quality to prevent stress-related diseases, maintain fish for research, and increase fish production per unit area. It highlights the role of plankton in fish production, the impact of dissolved oxygen on fish survival, and the effects of pH and other water quality parameters on fish health. The report also provides information on the use of fertilizers to enhance fish production, with examples of successful applications in various regions. Overall, the report serves as a comprehensive guide for managing water quality in pond fish culture to achieve optimal fish production.Water quality management in pond fish culture is essential for ensuring the health and productivity of fish. The report discusses the relationships between water quality variables and fish production, focusing on factors such as temperature, salinity, turbidity, plankton, dissolved oxygen, pH, carbon dioxide, ammonia, hydrogen sulfide, total alkalinity, and total hardness. It also covers management techniques for maintaining good water quality, including the use of inorganic and organic fertilizers, liming, and the removal of clay turbidity. Water analysis methods, such as Secchi disk visibility, are also discussed. The report emphasizes the importance of monitoring and managing water quality to prevent stress-related diseases, maintain fish for research, and increase fish production per unit area. It highlights the role of plankton in fish production, the impact of dissolved oxygen on fish survival, and the effects of pH and other water quality parameters on fish health. The report also provides information on the use of fertilizers to enhance fish production, with examples of successful applications in various regions. Overall, the report serves as a comprehensive guide for managing water quality in pond fish culture to achieve optimal fish production.