pH Reagent drops for testing pH of water. Comes with pH color chart. Simply add 2-3 drops into small amount of water. Shake and observe color change then compare to the included pH chart to determine pH.
Only AlkaViva has the confidence to test their water filters using an independent US EPA-Certified lab to ensure you are drinking not only alkaline water but clean and purified water with the best contaminant removal available. See the results here.