Some people think a standard water softener (the salt-based kind) can remove manganese. Lies. Softeners only exchange hardness minerals like calcium and magnesium for sodium. Manganese is a tougher nut—it can actually foul the resin beads in a softener, making them useless. If you have both hard water and manganese, you need a softener with a special resin designed for iron and manganese. That’s a pricey combo, and it still won’t remove high levels above 2 mg/L.
So unless you enjoy replacing your softener every year, don’t rely on it for manganese removal.
Top 5 Water Filters for Manganese Removal Guide