Dear moms, my lo is 4 months old .she was doing green potty like mehandi paste from 2-3 days. currently i m at my in laws place (Ranchi). she is in formula feed Nan Pro 1.i using filter water of aqua sure for feed . for sterliz using normal tap water or filter water. The calcium content in water is very high . It leave white powder like substance on bottel during sterlizing. Is green potty is due to that. plz suggest......need help.