questions: query regarding water quality and bacterial disease. 
 answers: to correct water quality - immediately stop feeding and application of fertilizers. partial water replacement. application of lime 160 kg/bigha (5-6 ph), 133 kg/bigha (6-6.5 ph), 55kg/bigha (6.5-7.5 ph). 1/3 rd of whole quantity applied 1st installment remaining quantity divided into 11 equal installment applied monthly basis.
treatment of bacterial disease- dropsy- apply 1ppm potash, 3 gm oxytetracycline mix with per kg of feed.