Quote Originally Posted by PoolDoc
WRONG!

PH should be adjusted first. The reason is that your alkalinity will change, if you adjust your pH, and what was a problem, may not be one, once you fix the pH.


Ben, I have a question. If the pH is high, say arround 8.0, and the alk is low wouldn't it make sense to raise the alk first and then lower the pH into proper range? Lowering the pH first would also lower the alk and then when you raise the alk you raise the pH again. I can understand adjusting pH first if it is low since raising it will also raise the alk and both could end up in the proper range then. I have a good grasp on the chemisty involved but would really like your take on it since the interaction between the two does make it tricky. Thanks!