Style pH Balance ALK(Y9A). This enhances the taste of the water while promoting better hydration and increases to 50-80 ppm after mineral addition. Alkaline Remineralization Y9A Model. Non-0 TDS ≠ malfunction：Y9T reduces TDS to near-zero via unique filtration technology; Y9A will boosts TDS (10-30ppm) by remineralization for alkaline water, while and mineral content.