Use tap water that has sat out a few days or put an airstone in it to expedite the process of evaporating off the chlorine. Or rain water. Bottled water is a JOKE! A racket! A scam! Tap water and rainwater flows freely to its destination, whereas bottled water (millions and millions of gallons of it) is trucked around the country at substantial cost to you AND the environment. And in most cases its no better then tap water. Every time you use bottled water you are also using diesel fuel, because thats how it got to you. And then you also have to deal with the bottle it came in. Do you know what PCB's are? Sorry for the rant, and good luck growing!
Ohh...If you want a inexpensive, accurate PH tester, search for Milwaukee 600 PH. 20$ on ebay. Peace.