If I use the Colloidal Silver Preset I still have to choose a frequency set from the database to run a channel. There are many items in the database if I Search Colloidal Silver. Which one to use? Penny Yu April 22, 2016 04:00 Follow The Preset already contains the required frequency. It is 5 Hz. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.