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the higher the TA the faster the pH will rise, particularly with a salt system because of the aeration created in the cell because of the generation of hydrogen bubbles so keeping the TA lower is important. Keeping the TA between 50-70 ppm will help because there will be less outgassing of CO2,which is the main cause of pH rise. Read these. It will help explain what's going on. https://www.poolspaforum.com/forum/index.php?/topic/52522-some-truths-about-ph-and-ta/ https://www.poolspaforum.com/forum/index.php?/topic/28846-lowering-total-alkalinity-howto/ The second one goes into the chemistry of TA and why high TA causes a faster pH rise Borate can be sued with a chlorine or bromine generator without problem and will help stabilize pH because it introduces a boric acid/borate buffer that, in conjunction with the carbonic acid/bicarbonate buffer we call TA helps "lock' the pH around 7.7 to 7.8. If you add borate do not lower the pH below 7.6 and don't lower it until it hits 8.0 or higher and keep the TA 50 to 70 ppm for best pH stability.