Good enough
I have been mostly pleased with these drops. Of course it is only color variances, so you can't know exact numbers. However, I really had fun testing any water I could get my hands on. I was shocked to see how many different brands of bottled water turned yellow. (Acidic). My water from spring fed well turned green (balanced) , and when I add alkaline drops to my water, it turns blue, (alkaline). No matter what I added I never could get it to the extreme sides of the colors, (red and purple)
Rating: 4 stars