... period in the threedemonstrations in Thanh Hoa, Ha Tinh and Quang Tri. These were 5.22, 4.75 and 6.14respectively. In the beginning of the production cycle, that is from fingerling to 300g/fish, ... the rural communities of Vietnam and other countries in Asia includingChina (Vincke, 1997). This farming model isvery efficient in terms of recycling of the materials in the system (Bilard et ... is, near to the pump and in the centre of the pond.Samples were then tested for NH3, NO2, pH,DO and hardness by using test kits and laboratory analysis. The results wereinterpreted in comparison...