Recent content by htwooh

Hi Jason, Thanks for the welcome and for the information! I used the TF-100 FAS-DPD test kit to measure the free chlorine the morning that I tested the pH with the kits and pH meter. That evening, after a full day sunshine on the pool, the free chlorine was 2.0 ppm. The pH still tested at...

My pool water pH tests as 7.5 with the Taylor phenol red indicator kit or 7.6 with a similar BioGuard kit; however, the same water sample shows a pH of 7.0 when tested with a glass pH electrode and well calibrated pH meter from my research lab. Any idea why this discrepancy is occurring...