Especially if you are low carbing, watch that your potassium intake is at least 2000 mg per day. Low potassium combined with EC can put you at risk for heart palpitations. In reality, you should be getting a 2:1 potassium:sodium ratio. So around 3000-4000 mg of potassium and 1500-2000 mg sodium. Potassium is in a TON of foods. Do not try to supplement it with pills or powders. This can be dangerous too.
If you want to know how much potassium is in your diet, input your diet into NutritionData
Avocado's are rich in potassium and a good choice if you are low carbing.
Also, monitor your blood pressure. If your blood pressure goes outside the normal range, STOP the ec stack. And do not take it if you have borderline high blood pressure.