citric acid seems to be the best and easy to use.
I order mine from GLOBAL LIGHT. It comes with directions
2 teaspoons of Acid to 3 oz of distilled water.
It is cheap and no hassle. I messed with the lemons etc
forget it. citric acid +MMS+3 minutes+dilute for taste with something you can handle without Vit C (Gatorade!) and you are on your way. Go slow.