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The BioStone UltraWater uses the BioStone Plus compressed carbon block but then turbocharges it with UltraWater Wrap technology ensuring unmatched reduction. Up to 99.9% of virtually all contaminants are removed, including chloramine, pharma, heavy metals and resilient contaminants like chromium IV and arsenic. Add Scale Guard protection and it outperforms any other filter we know of. Clearly the best choice you can make in a filter.
Use - Left side of your H2 Series ionizer.