Not potassium but salt and sugar, I have one or two electrolyte ice
Blocks on really hot days (Hydralyte) or Coconut Water which contains electrolytes.

You can eat bananas or drink gator aid

I never be an issue with potassium but need to verify as now a days I am feeling a bit low due to some other reasons too, as I am not sent back to work etc etc
But low levels of sodium can be a cause to seizures!!

I haven't been to the ER for quite awhile but when I get routine labs done...
My Sodium and chlorine are slightly low.

Phillywoman - water, water, water. I lost 18 lbs last year. Part of that was drinking at least 64oz of water a day.