You can normally get by using City Tap Water, that was clorinated, in Hydroponic Growing. If you read up on WATER in GROWFAQ, you will see many others agree. The Clorine disapates fast. BUT that PH level is way too high !
Yes, you can use thePH UP - DOWN liquid drops that Walmart has in the Aquarium Section. The Vinegar or Baking Soda is OK too, if used in moderation. There is a danger of adjusting the PH too rapidly or too frequently up or down, in Hydro Growing. Be very SLOW and Cautious! Adjust in very small increments.
Are you using the STEALTHHYDRO bubbleponics kit?