This handbook provides practical guidelines for organic polyculture of freshwater fish in Vietnam, developed under an FAO-supported project to promote sustainable aquaculture. It explains key principles of organic production, including site selection, environmental safety, and compliance with national standards. The document details pond preparation, water quality management, and ecosystem-based approaches that emphasize the balance between fish, plants, microorganisms, and natural food chains. It highlights the importance of using organic feed, locally adapted fish species, and disease prevention through biological methods rather than chemicals. The handbook also outlines techniques for developing natural feed, managing nutrients, and maintaining optimal conditions such as temperature, pH, dissolved oxygen, and water transparency. In addition, it provides guidance on stocking, care, and harvesting practices. Overall, the manual aims to help farmers improve productivity, product quality, and environmental sustainability while meeting the growing market demand for safe, organic fish products.
