Is there any detailed introductions about different database?

[Penny]

Greetings good people.

I used phreeqc and llnl database to run same codes. as a result, different outputs were obtained, such as  Distribution of species, Distribution of alkalinity, Saturation indices, etc.

so I am confused with the differences between various database.

What is the applicability of every database? is there any instructions or introductions according to every database?

Thanks in advance!