The Effect of tea saponin,a pond-clearing agent,on prawn's growthwas tested in the productive pond and the laboratory pond.Results showedthat tea saponin did no negative action to prawn's growth.During the56 days of the pond feeding,the length of the prawn increased 0.636 mmper day for the 0 ppm treatment,0.688 mm for the 5 ppm treatment,and0.834 mm for the 10 ppm treatment.The prawns in the productive pondgrew very fast within the first 15 days after the pond was treated bytea saponin with the concentratio...