How to Make Potassium Nitrate

I create KNO3 using household chemicals following NurdRage's tutorial. I made the KNO3 using KCl and NH4NO3. KCl is found as No Salt a sodium free salt at some stores. NH4NO3 is found in instant cold packs. Equation to make KNO3: NH4NO3 (AQ) + KCl =