Question: asking about general idea of fish farming and pond construyction

Answer: water depth 1.5m to 2m and best size is rectangle and square
eradication of aquatic plant, insect and unwanted fish
liming to maintain ph 
fertilization of pond using cowdung, ssp and urea to develop plankton 
release of fish fingerling @ 15000to 20000
production 2000 kg to 2500 kg per hactare in 8 month
scheme under state please visit district fisheries office