Question: asking about fish pond:  preparation  , management and feeding 
Answer: pre-stocking : apply lime -10 kg per bigha after 7-10 days use cowdung -30-40 kg per bigha , urea- 3-5 kg per bigha and ssp- 3-5 kg per bigha 
post- stocking : apply rice polish and mustard oil cake in  1:1 or floating feed