Ultrasonics will remove dirt ,polishing rouge and such. Ionic
cleaners are mainly for removing tarnished and or oxidized surfaces.
A ionic cleaner will not remove dirt or particles . I use both
machines in tandem and it works great especially with silver chains
or any ruff texture that cannot be polished easily. ( like nuggets ,
If you need a jewelry cleaner , use a ultrasonic and then complement
it later with the Ionic cleaner.
Hope this helps