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Higher alkalinity stabilizes PH. With the tap at 220 try to get your hardness down (or up) to about 100 and don't touch the alkalinity ... you should be balanced OK - look at the watergram and you'll see that your tap PH and alkalinity at 100-104 F is OK with a calcium hardness of about 100. The higher alkalinity should lock in the PH.
Vinny, I understand you don't want to fight it, but you really have no choice. When you get in the tub, you turn on the pumps, which causes the pH to rise if the TA is too high. My tap water has a pH of 7.2, with a TA of 400. Now my TA test results may have been high because of the new test kit (static electricity causing smaller drops from the test solution), but it was still very high. I settled in with a TA of around 60 and my pH was 7.6. I did add boric acid to stabilize the pH also.
I did add boric acid to stabilize the pH also.