newnick
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I just looked at that this morning. I know it's simple but I think my eyes are crossing while I'm staring at it.
steve1969 said:Last night I bought a gallon of 31.45% muriatic acid and poured one quart into the skimmer (to lower my pH down to 7.2 from 7.7 or 7.8). My TA was 120. I also pointed the jets up at the surface for aeration and went to bed. This morning, the pH is still 7.8 and the TA is still 120. Does muriatic acid take a while to affect the water? I wouldn't think so. My CYA is still 80, FC = 3.5 CC = 0, salt = 3200. Everything seems in line except TA and pH are high and didn't seem to want to go down with the acid. Any suggestions?
This link might be more helpful to you than the pool school article.steve1969 said:I didn't check pH after adding the acid last night. I will try that tonight. The pool calculator says 32 ounces for my pool (one quart) to lower pH from 7.7 to 7.2. If TA only drops by -8 with this addition, I'm going to need a lot more muriatic acid to drop my TA by 50ppm. Here are my questions which I'm still slightly confused about:
How long after adding the acid can you swim in the water?
Depends in part on how low you make the pH. If you are only making a small adjustment wait about 30 minutes and test the pH. If it's in range then swim.
Will the pH keep rising back up on its own?
In most pools, yes
What is the aeration doing?
Aeration speeds up the outgassing of carbon dioxide from the water. In English this means it makes your pH rise without making the TA rise.
Should I be adding acid more than once a day?
If your pH is rising that fast and you still haven't reached your TA then yes. Monitor the pH and when it gets above 7.4-7.6 drop it back down to 7.0 and retest the TA.
Thanks for the help. My pool was trouble free for the month of May. I balanced the water perfectly for the SWG, turned it on, and boom - the pH rose. Other than that, everything is still cool.....