questions: query regarding control of agal bloom and fish mortality due to bacterial diseases. 
 answers: immediately stop the application of feed and fertilization, manually (netting, siphoning),  apply lime (quick lime)-10-13 kg/bigha/month, use 4-5 ppm (mg/lit) potash to disinfected the pond water. to control smell of pond water use taximar 5kg/bigha. for bacterial disease use  3gm of tetramycin for 1kg of feed for 8-10 days.