No, keep taking your magnesium supplement. The amount found in salt isn't anywhere near the amount humans need. With the exception of sodium, the minerals found in Himalayan salt are in trace amounts.
No, don't stop taking magnesium, the magnesium is the salt may help hydration and replacement of trace minerals but you still need a good supplement and food. 💗
I just lick my finger, dip and swish in my mouth followed with water. It's great for fasting, if I lose to much salt from peeing, I lick my finger, swish and drink water, I feel better within minutes! The weakness is gone.