questions: asked about the management for the growth of fishes. 
 answers: told him to apply cowdung and if available pig and poultry manure should mixed and applied. cowdung is applied 1400kg for a culture system. for example if you want to do the culture of 6 month then you have to apply 230kg per month and put it in a corner of the pond. it can be carried out in an interval period as per your requirement. liming should be done to maintain the ph and it is applied 40kg for a culture system, but for a culture period of 6 month you have to apply  6kg per month in an interval as per your requirement.