K - Potassium GANS
Sources: Pumpkin Seeds are a natural source with Potassium too (but also have other elements in it too). Look for other natural sources too. Nutrinos from the pharmacy.
(Also you can use salts of K too, for producing this GANS or you add already at the Nano-coating process 20-30% KOH to the NaOH (80-70%). Don't forget, that the fields are now captured in the Nano-coating. If you want to produce other GANSes, or normal CO2 GANS, you have use Nano-coated plates/wires with NaOH only!)