Since everyone is different, different amts of electrolytes will be needed. I’ve heard of ppl needing no electrolytes for a 3 day fast. When I do 24 hr fasts, I like to have a few small chunks of unground pink salt. For future fasting, 1/4 tsp of lite salt + lemon juice in 20oz of water tastes great imo. That would provide 350mg potassium, and 290mg sodium, and 40% daily value iodine. Then you can take a magnesium tablet separately.