Install a water softener
Use a salt-free water conditioner
Add a reverse osmosis system for drinking water
Use a showerhead filter
Use a whole-house filtration system
Boil water for temporary use
Add washing soda to laundry
Use vinegar to remove mineral buildup
Clean faucets and fixtures with descaling solution
Replace clogged aerators and showerheads
Test water hardness regularly
Maintain and regenerate softening systems as needed