lower current produces a much smaller particle. I Use the SOTA Instruments Silver Pulser that uses Bob Beck's schematic. High Quality colloid with controlable ppm's. Well worth the $300 for those who cannot build the simple device. Distilled water assists in producing the smaller particle as well. No real need for salts in the H2O. Just be patient bcuz with a lower current you have to let it 'brew' a little longer. >>8342172