Hi, I'm new here and have a Taylor K-2006 test kit and use the BBB method, sanitizing with 12.5% chlorine. I love how easy this is and my pool water is sparkly and clear. I do wonder about something. I have a perplexing problem with testing pH. I rinse the sample bottle with pool water and then test pH. Test 1 was 7.2. I immediately did the test with more water from the sample bottle and it was 7.6. I test a 3rd time and it came out closer to 7.6. For the past week I have been testing twice and the first test is always lower than the 2nd test. Which do I believe?