Did you try this experiment under salt water as medium for its spark for purifying water into clean water with the lowest dc voltage https://www.youtube.com/watch?v=tvuT-2uCHxU
I am sure this is a new idea that I proposed that can be establish a new trend for water purifying with lower cost of money and energy. No one interfere the induction coil for generating high voltage electricity under salt water for purifying it using small current dc voltage.