pH was 7.2...now 8.2
I have a 15K gal pool and chart said to put 47 oz by weight of Borax in there to raise it from 7.2 to 7.5. I weighed it out exactly with a digital scale (put the container on there and it registers Zero and then increases by weight of what you add) and put 47 oz. in there and it raised my pH to 8.2 Is there something in my chemical balance that made it raise it that high? I have to put muriatic (23 oz. according to the chart) in there now to drop it. Where did I go wrong?
I did it this afternoon so maybe it will adjust? Pump has been running for about 5 hours since I put the Borax in. Using TF 100 kit to test AND K-1000 Basic Residential Pool & Spa Test Kit (OT). Tests match. Also have a Taylor Speed Stir, which I LOVE!