PURE 2.0 is a professional grade uncontaminated seawater salt mix. It is superior to other salt mixes by being entirely made from pharmaceutical and analytical grade reagents. The unique 5-component modular system ensures a consistent, balanced seawater mix by avoiding: (a) the separation of salts during transport and (b) unintended chemical reactions between components. With PURE 2.0 there is no precipitation or cloudiness when mixing seawater. Unlike salts prepared from industrial grade reagents, which contain trace elements of unknown types and quantities, PURE 2.0 only contains beneficial trace elements formulated to approximate natural seawater.