@skyfaller I made one that just had potassium and magnesium cuz I figured most ppl already get too much sodium anyway from american food. I used citrate salts from nutrition store. But also mine was not specifically for electrolyte, it was an energy drink
You can read nutrition facts labels to get good info on how much of what mineral is in stuff. Then match that up with how much "dose" you want in each liter of liquid