I added borates to my SWG pool a few months ago, and my pH tests (Taylor 2006) seemed to read high thereafter. I added borates to my spa about 5 weeks ago (stand alone LA Spas Maui) and I am noticing the same thing. My pH test consistently runs a few points higher than when I go test at the pool store. My alk test also seems to be a lighter green than without borates (but the results are the same). This makes me wonder what tests borates might alter.
I added boric acid in the amount calculated by pool math to reach 30 ppm borates. While it has slowed my continuous high pH drift (accompanied by downward alk drift) it has not stopped it. I use a floater with bromine tabs. I have checked the expiration on my reagents and just received a new Taylor 0004 phenol red, but no difference from my older tube.
Does this happen to others? Is there another way to accurately measure pH that is not affected by borates? I had a cheap pH meter, but I wasn't confident it was staying calibrated.
I added boric acid in the amount calculated by pool math to reach 30 ppm borates. While it has slowed my continuous high pH drift (accompanied by downward alk drift) it has not stopped it. I use a floater with bromine tabs. I have checked the expiration on my reagents and just received a new Taylor 0004 phenol red, but no difference from my older tube.
Does this happen to others? Is there another way to accurately measure pH that is not affected by borates? I had a cheap pH meter, but I wasn't confident it was staying calibrated.