Note: this is a humidifier, not a de-humidifier.
Was brought to me for repair but was correctly showing the water tank needed filling. When told it is a humidifier, the owner did not want it.
More info: https://www.amazon.co.uk/dp/B00FYTM7FS and https://www.youtube.com/watch?v=rjLQwhx5Z-E.
No "ionic silver stick" is fitted.