Hello all,

New pool owner, I have been doing the BBB method since start-up (Nov 06). The water has stayed pristine and beautiful since day one. So many thanks to all of you for this wonderful forum.

I have been using a Taylor 2006C test-kit for all my testing, and here are my numbers:
Water Temp - 72F
FC - 3.5
CC - 0.0
PH - 7.6
TA – 130
CH – 180
CYA - 35

I have two questions, both concerning PH. The first question is this. Several weeks ago, in an effort to see how repeatable the test results were, I tested everything, and then re-ran the tests. The results from the second set of tests matched the first pretty well (within 1 drop of reagent) except for the PH. The PH reading on the second test was about 0.5 to 0.6 higher than on the first test.

Since that time, I have been testing the PH twice every day, and consitantly the PH will be 0.5 to 0.6 higher on the second reading. As an example today my first reading was 7.0, the second test reading was 7.6, the third was 7.6. I have verified that the readings stay constant after the second test.

At first, I thought perhaps the PH indicator solution was bad, so I purchased a new bottle but I get the same results. I then thought maybe it is my color perception, so I had my wife read the results with the new bottle as the old. She came up with the same numbers as myself...Can someone please explain to me what is going on?

My second question concerns PH stability. The PH in our pool (Pebblesheen finish) has stayed relatively constant for the last month without any intervention on my part. Is this normal?

Thanks,
John P.