Can someone please assist me with my electrolyte requirements?

I'm not completely comprehending the information in the wiki and electrolytes 101. If someone could help me understand my daily minimum requirements during a water fast, I would greatly appreciate it.

I am sure I am taking enough magnesium, in the form of magnesium oxide as I have been taking it regularly as prescribed by my doctor 1680mg day, for years.

I purchased this potasium product and am not sure if I only require 1 tablet, 1x a day and no salt as it contains iodine or do I additionally supplement with salt?

I do know that Himalayan salt is not iodized, hence I purchased the potassium with iodine, but do I take that for trace elements in this situation, with these tablets?

I don't understand the amounts I require.

This is my second time fasting for 5 days. I very kindly appreciate any advice that can be given with respect to my electrolyte intake maintenance. Thank you 😊