An RO system is going to be ideal for removal of dissolved solids. especially downstream of a water softener. A meter that measures Total Dissolved Solids (TDS meter) is very inexpensive, as cheap as $9 on Amazon.
Remember, a water softener simply exchanges ions one for one. For example, a sodium ion replaces a calcium ion. Your softened water contains plenty of sodium (not sodium chloride) and still contains dissolved solids. The good news is that sodium deposits don't build up a scale like calcium does. So softened water does not destroy coffee makers, water heaters, home heating systems and so on.
But keep in mind that if you are using a humidifier with softened water that contains sodium, that sodium will be inside the machine and in your air.
Not unlike people who use softened water in their coffee. It leaves a distinct feel and taste that many people describe as "flat". The sodium does have an effect and it's better if you use water without it.
Remember, a water softener simply exchanges ions one for one. For example, a sodium ion replaces a calcium ion. Your softened water contains plenty of sodium (not sodium chloride) and still contains dissolved solids. The good news is that sodium deposits don't build up a scale like calcium does. So softened water does not destroy coffee makers, water heaters, home heating systems and so on.
But keep in mind that if you are using a humidifier with softened water that contains sodium, that sodium will be inside the machine and in your air.
Not unlike people who use softened water in their coffee. It leaves a distinct feel and taste that many people describe as "flat". The sodium does have an effect and it's better if you use water without it.