Yes, but also consider simply structuring the water as an alternative to removing the natural minerals. http://naturalactiontechnologies.com/hydration-facts/

Well depending on the source. Tap water may not contain very many natural minerals. Can that be used on any water and provide clean drinking water?

Yes, it changes the energy, electrically disassociates the toxins and pulls them into the water molecule to pass out of the body. The portable unit was used with tap water in Bombay, India and the waters in the Amazon with no illness. 1 pass through the unit will do the job, but multiple passes will increase the life energy. Use for Structured breathing in low air quality also. Brings everything back in a natural state of balance. Think in terms of Energy, Frequency and Vibration to understand the universe.