I take 2 tablets of potassium chloride 20 meq ER daily, prescribed by doctor. I take both together in the morning with kefir and then have breakfast. Don't ever take it on an empty stomach, as it can cause gastritis and gastric ulcers.
I also found Liquid I.V. Hydration Multiplier on Amazon, but haven't tried it yet. It has good reviews. If you enter "ostomy" on this site in the search bar above the questions section, you'll see many comments from patients who use this. It tastes like lemon-lime, is not carbonated and has a good flavor, according to users. There were also comments about feeling better very quickly after drinking this. After I use this, I'll comment again. Am thinking that if I use this, I might have to cut back to one pot. tablet, as too much potassium can be as much of a problem as too little.