tip3p TIP3P TIP 3-point, recommended
tip4p TIP4P TIP 4-point
tip4pew TIP4P-Ew TIP 4-point optimized with Ewald
-tip5p TIP5P TIP 5-point (see http://redmine.gromacs.org/issues/1348 for issues)
+tip5p TIP5P TIP 5-point (see https://gitlab.com/gromacs/gromacs/-/issues/1348 for issues)
spc SPC simple point charge
spce SPC/E extended simple point charge