I also have the issue of constant high pH and low TA. I use monopersulfate and Nature 2 to kill bacteria. I have never had the issue with TA and pH until recently and I've had the same spa for over 20 years. My question - can a faulty ozonator or heater cause the pH to increase? I set and check calcium hardness regularly but it's never an issue. I've tried draining and refilling a few times and within a couple of hours the pH is shooting up. I've tested my tap water and it's always very good with the pH about 7.6 or so.
Constant Ph Drift Up
in Hot Tub Water Chemistry
Posted
I also have the issue of constant high pH and low TA. I use monopersulfate and Nature 2 to kill bacteria. I have never had the issue with TA and pH until recently and I've had the same spa for over 20 years. My question - can a faulty ozonator or heater cause the pH to increase? I set and check calcium hardness regularly but it's never an issue. I've tried draining and refilling a few times and within a couple of hours the pH is shooting up. I've tested my tap water and it's always very good with the pH about 7.6 or so.