I wanted to know if you could recommend an appropriate data set for modeling seawater and/or brine systems. I am using the thermo.dat set right now and, looking at the file, it appears to support debye-huckel and b-dot activity calculations. I know that the ionic strength of seawater is way beyond the range of debye-huckel, but I'm not sure how long b-dot holds up. I was considering using thermo_pitzer.dat set, since I think the virial equations hold at much higher ionic strengths, but CO2/HCO3-/CO3-- is not included in the basis set, and carbonate minerals do not appear either. Thanks for any help!