Hi, when we add Nacl, can use -pname NA -nname cl in GMX so for sodium acetate, how to display it ? Thank you very much! maggin -- View this message in context: http://gromacs.5086.x6.nabble.com/how-to-add-sodium-acetate-tp5008786.html Sent from the GROMACS Users Forum mailing list archive at Nabble.com.