What kind of water do you use to make St. Elena's Pacamara coffee by hand? why is it astringent?

Professional coffee knowledge exchange more coffee bean information please follow the coffee workshop (Wechat official account cafe_style) Santa Elena Manor story introduction: Santa Elena Manor FINCA SANTA ELENA is located in the west of El Salvador Santa Ana volcano producing area, the average elevation of the manor is about 1850 meters, is one of the highest local estates, currently