If you are adding powders/ mixes and other chemicals to your water to control the pH: you are asking for BIG troubles.
Using crushed coral or drift wood is infinitely safer. The pH will remian relatively stable and shift very slowly either up or down.
A stable pH that doesn't swing is by far the most important pH to keep your tank at, regardless of number. If you are adding chemicals to your water you are pushing your pH in one direction or another rather quickly.... so each water change, your pH swings back, you add more stuff its swings again. And God forbid you should accidentally run out of stuff, then you either can't change your water that week, or if you do, you have another pH swing... its all bad juju.
Put crushed coral in your tank some where to raise it (in a bag of panty hose in the filter, or mixed into your substrate) and put in more drift wood to lower it. Stable, safe, cheap, no forgetting to add it by mistake, no accidental over/under dose....
Its a no brainer, anyone adding chemicals with each water change is taking big chances, for no valid reason, with their fish.