How high? Do you have a water test result you can share? We don't have a well, but our local city water is pretty hard. I've never heard of a filter that would remove dissolved minerals, however a water softener might be something to consider. If you get a whole house model, it will have benefits for plumbing, water heater, dish washer, and other stuff. If concern about sodium in your drinking and plant water, you can use potassium chloride instead of regular sodium chloride. I grew up in a place with naturally soft water, so when we moved to Houston, what a shock! After 40 years of hard water, we moved to a new house and first thing was to get a water softener. Best $2,500 we've spent.