Water stored with one or two tablespoons of colloidal silver per 5 litres will be safe and sweet tasting for a very long time. Water containing germ contaminants (not toxic chemicals) can be made drinkable by adding two to three tablespoons of colloidal silver per every 5 litres of water. Test results show that Oxymin® colloidal silver passes the bacterostatic test and is consistently true to label - 50mg/L. A bacterostatic condition is where disease causing micro organisms cannot grow and multiply. Oxymin® Silver is one of the few colloidal silver products sold in Australian retail outlets that have a guarantee of true colloidal particle size, ranging from 0.0001 micron to ionic state.