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 How long do the filters last? Can AquaTru filter hard water? I just changed my filters. Why is it leaking water now? How much do the filters cost? Where can I find the owner's manual?