Many say not needed. I didn’t necessarily buy all of the “science” that was presented to me, but I did buy a system. Nothing scientific about it but all I know is the water smells better, tastes a LOT better and I actually get soap suds when showering in it. Is it a must? Well that’s up to you to decide. But I am happy with mine even if someone came to my home right now and took out a kit to prove to me that I didn’t really need it.
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