questions: query regarding control algal bloom. 
 answers: to control algal bloom- immediately stop application of fertilizers and feed, manually (siphoning, rapid netting and can use bamboo to remove bloom), apply liming-
liming- 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. you can use copper sulphate 0.2-1.0 ppm (avoid if fishes are rearing),