Unless your lfs is next door, you will not get an accurate pH reading on your water. As soon as it's taken from the tank the pH will start to change because it's being airated diffently than it was in the tank. o2 and co2 play a major part in ph.
If you want to lower your pH, add about 1 1/8 cup of baking soda to a gallon of RO water and dose that about 1/4 cup at a time and monitor your pH.