I make rejuvelac often as well as kombucha. It's a pretty easy process. I learned at OHI. Here after bit ill try and post the OHI recipe, but my recipe is 3/4c wheat berries, 1oz rye, 1oz fenugreek. Measurements equal 1cup of grain. I poor the whole grain into a quart jar fill with clean room temp water and leave 8-12 hrs. Then drain, dump the soaked grains in the food processor tap the pulse button a few times to break the grains. Then dump that in a gallon jar fill with water let ferment for 2 days strain out the grain and put in fridge. When first starting probiotic drinks it's beast to start small 4oz servings and move up gradually as your system might take a little shock from it.