I hate the salty solutions that people make so i decided to trick myself into making a spicy no substance soup.
I add the 4 salts to hot water and add a little spices like turmeric, paprika, chilli powder, garlic powder. No proteins. So instead of being brine it becomes a soupy tasting water. I put that in a flask and sip it all day.
Not really answering your question sorry but to me potassium tastes absolutely vile. There is no way I can take it by putting under my tongue. Its not at all like salt, it has a metallic somewhat weirdly bitter taste (at least to me).