I am real new to the hobby ( working on my first batch ) I've read there is a lot of difference in water and the final product. I've aslo read it is best to use store bought drinking water. The question is I have a ro/di water filter. At the ro stage the water is around 11 ppm tds. At the di level it is at 0 ppm with is unsafe to drink since it would pull minerals from your body being it is the pure form of water. Has anyone out used either ro or ro/di water???