Can I trust Hydromx®? October 14, 2021 By Hydromx® has been proven to increase comfort and save energy over the years. Hydromx® does not harm people or the environment and will inhibit oxidation and calcification in your heating system. Hydromx® increases the efficiency of your heating system by reaching the desired temperature settings more quickly and will keep that temperature longer. This special benefit will reduce energy cost as well as reduce carbon emissions.