They make potassium supplements in amounts too low to be harmful if taken at recommended dosage on the bottle. Funny enough, low sodium spicy V8 has a pretty hefty chunk in there for potassium. I assume you're on some kind of potassium sparing diuretic? Remember magnesium glycinate and magnesium oil. Magnesium glycinate is better absorbed than it's citrate version, and won't give you the turboshits. The "oil" is just used topically, and you don't have to deal with full body stiff/sticky sensations that you do with epsom baths. Also, making sure salt you get has natural mineral content and iodine in it is a good idea for healthy thyroid support.