Yes, some contractors start with distilled water and add glycol, or a boiler water treatment product. Not sure how you would add "beneficial" ions. The HYDROFILL demineralizer simplifies, and reduces the cost of, the process of filling a hydronic system because it uses whatever "contaminated" free site water is available. That way, you don't have to purchase and then transport special fill water to the site.
Yes, some contractors start with distilled water and add glycol, or a boiler water treatment product. Not sure how you would add "beneficial" ions. The HYDROFILL demineralizer simplifies, and reduces the cost of, the process of filling a hydronic system because it uses whatever "contaminated" free site water is available. That way, you don't have to purchase and then transport special fill water to the site.