Potassium and magnesium?

I read in a post you recommend potassium and magnesium when on your eating plan. Can you tell me more about brands, dosage, etc you recommend?

Solaray has a Magnesium and Potassium Asporotate - 120 - Capsule. During the first couple months take 1 twice daily, then 1 a day after that. The first 2 months also take a separate potassium capsule twice daily, as the FDA has recently limited the amount of potassium in a single supplement capsule to 99 mg (to protect pharm company's prescription potassium), and most people will need at least ~ 200 mg potassium twice daily for the first 2 months. Thanks.