What kind of minerals does the pH + Mineral Boost Alkaline VOC Filter add into the water? November 09, 2021 00:07 Updated Follow The primary minerals that are added to the water are calcium and magnesium. Related articles How long do the filters last in AquaTru countertop purifiers? Does the filtered water taste from the pH + Mineral Boost Alkaline VOC filter taste different than regular AquaTru water? How many tanks do I need to run through AquaTru before using the pH + Mineral Boost Alkaline VOC filter? Can AquaTru filter hard water? How much do the filters cost?