One of the best ultrasonic RCMs ever built is the Klaudio, which relies solely on distilled water. It is effective at cleaning just about any LP - although perhaps not a used LP with old encrusted crunchy peanut butter in the grooves. There are advantages to this approach because by not using additional chemistry in the cleaning process, there’s no residue that then requires removal.
The Klaudio unit is not in current production and used ones are hard to find.
The Klaudio unit is not in current production and used ones are hard to find.