The Spark Nutrition Tracker doesn't work very well for micronutrients like potassium - because many/most of the foods entered into the database don't show their potassium content. Packaged-food labels are not required to indicate potassium - doesn't mean they don't contain any, they just don't have to write it on the label. As a result, you are probably consuming more potassium than your tracker would show.
I wouldn't worry about it unless you were tested for it and told by a physician that your potassium was low.
Some people like to "top up" their vitamins and minerals with a "one a day" sort of vitamin pill - that's all most of us need, if anything at all. If you are considering taking more than that, definitely consult with a doctor first.
Goal 1 - break 200 (46 pounds lost)**DONE**
Goal 2 - leave obesity behind (BMI 29.9, at 185#) **DONE**
Goal 3 - BMI = Normal (154# or less)
| current weight: 172.5