Thanks To All!! Clear Pool At Last

[chem geek]

Re-tested my pool. The PH and the TA did not change.
PH 7.8
TA 160
Should I add 28oz. more (per Bens chart)? I guess I am afraid I will add too much.
Suggestions???
Chlorine 8 would that have anything to do with my ph?
Thanks
Karen

Karen,

Did you ever tell us the volume in gallons of your pool? 28 oz. of Muriatic Acid into a pool of 16,000 gallons would lower the pH to 7.44 and the TA to 153.5 so either you have a much larger pool or something strange is going on. With the numbers you show, if you have a larger pool than you won't be adding too much.

Are you trying to follow the procedure in this thread to lower your alkalinity (TA)? If you want to stop fighting the pH rise and frequent additions of acid, then you'll need to follow the procedure to get your TA down to 100 or maybe even 80. Ben's procedure for lowering TA in the referenced thread has you add a lot of acid to get your pH down and then has you aerate which has the pH rise and you add acid to keep the pH down, all the while your TA will drop.

Let us know your pool size in gallons so I can roughly calculate what should happen when you add acid.

There's also a possibility that your high chlorine level is fooling you with your pH test. Usually a level > 10 will cause you problems, but maybe 8 is enough to cause concern. You are kind of in a difficult situation with high chlorine and trying to measure pH (more on that in my next post).
Richard