Magnesium is a naturally occurring element in the Earth’s crust that contributes to water hardness when dissolved in groundwater. It is one of the two primary minerals, along with calcium, responsible for hard water. High magnesium levels in water can cause scaling in pipes, reduce the efficiency of water heaters, and create soap scum. In water treatment, magnesium is often removed or reduced through ion exchange, reverse osmosis, or water softening systems to improve water quality and protect plumbing infrastructure. Magnesium is also used as an anode in water heaters to prevent tank corrosion, extending the lifespan of the heater.
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