Question: asking about fish nutrition and management and integrated farming
Answer: first please check water quality: ph, do, total hardness and total alkalinity
lime @ 8 kg per bigha per month
after 7 days apply cowdung @ 130 kg per per month
after 7 to 15 days apply urea @ 3.5 kg per bigha per month and ssp @ 2.7 kg per bigha per month

feed: rice bran and mustard oil cake @ 1;1 ratio

feeding @ 3% body weight 
700 gram fish need 21 gram feed 
feeding time half morning and evening

artificial feed company abis, godrej and nsf
feed protein requirement 28% for carps
 fish cum duck farming: 6000 fingerling in 1 hectare pond and 200 to 300 duck for 1 hectare pond