With such a low conductivity ...
Published by Alfred Lipshultz, President at Aquathin Corp.
With such a low conductivity there is no buffering capacity to the water and a stable pH value cannot be tested. There are no health related issues consuming low pH...other than anecdotal stories from non professionals. If you wish to add minerals and test pH, calcite media is inexpensive and easy.
Alfred J. Lipshultz, President