questions: query regarding control of algal bloom. 
 answers: to remove algal bloom - immediately stopped the application of fertilizers and feed, partial water replacement (siphoning), manually (netting, limmimg), can use copper sulphate 0.2 - 1.0ppm.
treatment for bacterial septicemia- use 1ppm potash, 3gm of tetramycin mix with per kg of feed for 8-10 days.