These test drops are the most effective and inexpensive way to test your water for Hydrogen concentrate levels and make sure your generator is working efficiently at specified PPM levels.  Don’t over pay for any inferior imported products that are not safe to mail because they are made from highly flammable ethanol.  Buy the only brand made in the USA from an ecologically safe composition that meets and exceeds all standards and is sold world wide.  If you have seen in videos of an ORP meter being used to test Hydrogen levels you are being fooled because those Trustlex meters are not made to test Hydrogen concentrates dissolved in water.  That meter has a setting that calculates the H2 level based on a formula if and only if the PH of the water used is a perfect 7 and can be easily manipulated and give you false readings.  Don’t waste $500.00 on a meter when you can buy these drops and get the only accurate test available today. These Drops are easy to use and you can call us for support.  Save and buy the H2 Water Maker with the test drops in Bundles product category.  We are the only seller that encourages you to test the efficiency of our H2 water makers by bundling the machine with the test drops.