questions: query regarding fish mortality. 
 answers: fish mortality due water deterioration or various disease-causing bacteria. immediately stopped the application of fertilizers and feed. immediately change the water @30% or given aeration using aerators. apply potassium permanganate @250gms/0.1 ha and agitate the surface with bamboo. to remove algal bloom use copper sulpate 0.2-1.0 ppm. visit district fishery office to check your water quality and ph and applying lime 160kg/bigha/year (ph- 5-6).