2 Gallons of 60ppm Colloidal Silver. Here at Atlantean Alchemy we do things differently. Welcome to the future of nanoparticles! We recommend our high voltage colloidal silver for daily maintenance. This high voltage method produces the smallest silver particles without the presence of ions. The critical factors that make a "good" colloidal silver product are particle size, purity and concentration. We use over 15,000 volts AC to create an underwater plasma arc in nothing but pharmaceutical grade deionized water. The result is extremely small silver nanoparticles in the range of .024 to 2 nanometers in size.  True Colloidal Silver containing 100% silver colloid  Made with only the purest 99.998 refined silver  Particles as small as 1-2 nanometers  The smallest particle sizes for maximum bioavailability