Prepare your jars, either sanitize them in a pot of boiling water for 10 minutes or wash in hot soapy water. Keep them warm. Prepare your water bath, keeping water hot, but not boiling.
Place grape juice, vanilla beans, and lemon juice in a large stock pot. Add 8 teaspoons of calcium water and stir well. (Note: stir it well, in the second batch I didn't stir long enough and had small little cloudy gelatinous gobs I had to spoon out due to not stirring in the calcium water all the way)
In a small bowl, mix 8 teaspoons of pectin and one cup of sugar. Bring contents of stock pot to a boil. Add pectin sugar mix and stir hard for 1 to 2 minutes. Now add in the rest of the sugar and stir until dissolved. Return to a boil and remove from the stove. Take out the two vanilla beans.
Fill your jars to 1/4″ headspace. Wipe rims clean and screw on your lid and bands. With rack in place, put jars in water bath and boil for 10 minutes. Remove from water onto a folded towel. Allow to cool for 24 hours. Check seals. Store on a cool dark shelf for up to a year. If any jars didn't seal, put in fridge for immediate use.
Makes 5 pints or 10 jelly jars. You can half the recipe as well.