Following help files are embedded in the graphical user interfaces:

    • HPx manual - help file for the HPx graphical user interfaces, additions to phreeqc, verification projects, examples, how to...
    • Phreeqc USGS - help file of the embedded PHREEQC version in HPGeochemistry and HPx.
    • Phreeqc T. Appelo - help files created by C.A.J. Appelo - https://www.hydrochemistry.eu/.
    • Gnuplot - help file for gnuplot instructions.