Mineral Spa is a dissolved ionic mineral salt. It is a magnetic sulfate mineral solution that is extracted through an acid sulfate process from one of the rarest, and most mineral-rich Biotite (Black Mica) sources on this planet. Mineral Spa precipitates many dissolved contaminants within the water, to be filtered out. Mineral Spa also co
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Best stuff in the world, changed everything about how I enjoy my hot tub. Works as advertised, I have used this product for over a decade and haven’t had to add any other chemicals at all, and only have to change the water once every year, even though it says only every six months. GAMECHANGER