How many tanks do I need to run through AquaTru before using the pH + Mineral Boost Alkaline VOC filter? July 13, 2021 19:05 Updated Follow After installing the pH + Mineral Boost Alkaline VOC filter, it is recommended to flush your AquaTru purifier with at least 4 tanks of water before consumption. Have more questions? Submit a request Related articles Does the filtered water taste from the pH + Mineral Boost Alkaline VOC filter taste different than regular AquaTru water? How long do the filters last in AquaTru countertop purifiers? Can AquaTru filter hard water? What is the difference between AquaTru and AquaTru Connect? How much do the filters cost?