Limestone is naturally present in most water sources. This water, which you get from your tap, comes mainly from groundwater, which is a reserve of rainwater that has infiltrated and become loaded with various minerals as it passes through the rocks in the ground.

The limestone in water is in ionic form and consists mainly of calcium and magnesium carbonate, minerals that our bodies need to stay healthy.

Ultimate Star Filter® filters do not remove limescale, just like the minerals dissolved in water, and that's a good thing for our health.

The limescale in water is therefore an important source of minerals for our bodies and does not need to be removed, unlike by washing machines, dishwashers or coffee makers.

If you have very hard water and your installation includes a water softener, read this topic.