I was a little skeptical by making this purchase, I thought nothing could fight limestone home (10 years to depress me watching my shower tiles bleach because tartar helplessly!). After 3 weeks of installation, I can say that this filter works !!! The limestone from settling more, which will save me the use of a lot of descaling, and surprise: my hair is again becoming soft as she dry state like straw (it was due as limestone!). one small problem: the pressure has decreased, so I plan to change my shower
