While we encourage the use of free/open-source software programs such as PHREEQC and Reaktoro in aiding the process design of, e.g., geothermal and CCS application, it is important that the users are familiar with the existing databases and their limitations. Any model predictions should be questioned if a prior validation against reliable experimental data has not been performed. Lastly, both phreeqc.dat and pitzer.dat include a double definition for some of the gases available, i.e., redox coupled and uncoupled. In the first case, the dissolved gas may undergo further redox reactions, leading to other aqueous species. For instance, in the redox coupled scenario, the conversion of CH4,aq and N2,aq to other inorganic carbon species and ammonium, respectively, maintains the brine undersaturated with respect to aqueous methane and nitrogen, allowing further gas dissolution. The difference between the two definitions becomes more relevant when complex aqueous compositions are defined, which could lead to a high redox potential and eventually cause certain aqueous species to reduce or oxidize. For the specific applications we addressed in this work, redox reactions are not deemed relevant, hence the redox uncoupled implementation used in this work.