The quality of Visual MINTEQ depends to a very large extent on the interaction with users. Comments and bug reports etc. are very welcomed. I cannot promise, however, to answer all e-mail messages I get. Please contact me using the e-mail address given on my personal webpage.
You are also welcome to join our Facebook group and interact with other Visual MINTEQ users (note: for this you will need to be a registered Facebook user).
Good luck with your modelling! / Jon Petter Gustafsson