Effect of lime, dolomite and gypsum on phosphorous reduction potential in freshwater

A fifteen days experiment was conducted with the application of different agrochemicals such as lime, dolomite and gypsum in two levels to find out the phosphorous reduction potential of these chemicals at laboratory. Among the 3 agrochemicals gypsum showed better phosphorous reduction at the dose of 40 mg/L followed by dolomite had comparatively high phosphorous reduction than lime application. The water quality parameters indicates that application of these chemicals at the rate of 20 and 40 mg/L dose level did not produce any adverse condition on the pH, alkalinity and hardness values. Hence, application of gypsum at the rate of 40 mg/L is recommended for use in aquaculture ponds to reduce the phosphorous load in the wate