Hey tribe, What's the best way to deal with hard water (bathing purposes not drinking)? Some of my family members have developed skin ailments after moving to Bangalore.

You can get a water softener installed. Cost me about 45-50k for the automatic version. Manual version costs about 30k from the estimates I got. When we say automatic and manual, it refers to the weekly/monthly cleanup

I use a WaterScience showerhead.

have developed skin ailments after moving to Bangalore.

That's not just "hard water" with dissolved salts. But, pollutants in ground water that one gets from the tanker mafia. (Remember the burning foam/froth in Bellandur lake?)