... 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 ... werecollected for water quality analyses. The sampling was conducted in different positions in tanks, that is, close to the water inlet and outlet and in the centre part of the tank. In the ponds two ... 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,...