ok i thought this too....however.
ground water- 7.5, 7.5
pfs ground water- 7.5, 8.0
cq ground water- 7.5, 8.1
new rinsed pfs ro water- 6.6, 6.5
new rinsed cq ro water- 6.6, 7.0
first number is started ph second number is 8 hours later.
the other tests i was running showed no more changes.
i can say that the untreated water has the same effect as the ro water. both show ph changes when sub. was added.
doesnt look like my water equipment is to blame.
i am unable to run the water just thru the ro unit. even to get to the ground water was a chore.
i have lots of consistent data, but still am at a lose as to what it means.
it seems the more i rinse the pfs the less the ph change. although the test is still new i wonder if boiling the pfs would make a difference..........