Heraclitus and Parmenides

Heraclitus and parmenides, who are usually contrasted to each oter, turn out to be doing something rather similar. You can always say poisonous for men and healthy for fishes, up from this end and down from the other end. So you so think about the sea water again. I suggested that he might work on his audience by putting sea water is poisonous and healthy. Audience goes, oh, crike, can't bear it. Help help. And then heraclitus helps them by saying, poisonous for men, healthy for fishes. Might work the other way round. Maybe that that was upsetting amenides.