[gmx-users] force field parameters for hydronium

[Bert]

Hi gmx-users,

I wonder if I can add H3O+ (Eigen) and OH- combined with SPC/E water model
into my system. I have not found any available force field parameters for
them in gmx yet, does anyone has itps and gros file for modeling them? BTW,
I do not care about the PH value, and  I only treat them as simple ions.
Thanks for your suggestions.
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