Question: what is the difference between deionized water and tap water?
Answer: To put it simply, De-ionized water is water that has all of its mineral ions removed where tap water is water from your tap and it is not deionized. The best way to know De-ionized water from other water is the TDS. If it is at 0 or 1ppm (parts per million) of TDS (Total Dissolved Solids) or mineral impurities.