Question: asking about fish farming process
Answer: first water quality testing 
apply bleaching powder @ 45 kg per bigha for aquatic insect and predator fish control
after 7 days apply lime @ 25 kg per bigha for ph correction
after 7 days apply cowdung @ 300 kg per bigha 
after 7 days apply urea @ 3.5 kg and ssp @ 2.6 kg per bigha 
after 7 days ready for fish fingerling stocking @ 2000 for rohu catla mirgala, cltla 
and spawn @ 2.5 lakh
 after stocking 
cowdung dose @ 100 to 130 kg  and lime @ 19 kg per bigha seperatly
and same dose for urea and ssp