What is anodized aluminum?
Anodizing is an electrolytic passivation process used to increase the
thickness of the natural oxide layer on the surface of metal parts.
So, it's a layer of aluminum oxide. But since pure aluminum is soft, your watch would most likely be made of an alloy. Some of the most common metal added to aluminum alloys ...
In short, balnotherapy (bathing and exercising in mineral water)
does not likely:
provide essential minerals through dermal absorption
improve symptoms of rheumatoid arthritis, other rheumatic conditions, osteoarthritis or fibromyalgia better than hydrotherapy (immersing in plain water)...
...but may help in dealing with stress associated with rheumatic ...