questions: asked about ulcer or eus of fish 
 answers: 1st day: lime @ 10 kg per bigha, mix with water: keep for 4 hours and spray
2nd day: salt @ 4 kg per bigha as a preventive measure
3rd day: as apreventive measure as well as cure, cifax @ 100ml per 10 l water and spray
oprional: potassiuym permanganate @ 280 gram per bigha for oxygen control