If you use a product, just follow the directions to slowly raise the alk.
Cooking the baking soda yeilds carb/bicarb buffer as well, but I have never done it. You will have to google or ask someone more knowledgeable than myself, but I know it works.
Cooking the baking soda yeilds carb/bicarb buffer as well, but I have never done it. You will have to google or ask someone more knowledgeable than myself, but I know it works.