High pH

[Nate1975]

I am have to add around a cup of muriatric acid every other day to keep my pH down to the 7.4-7.6 range. We do have a high swimmer load so is this normal??

 

[Derb22]

I don’t see a SWG. So what is your TA. Other test numbers?lots of splashing/ aeration will raise PH.

 

[YippeeSkippy]

While active swimmers can promote pH rise so can fountains, SWGs, and anything else that agitates the water and makes bubbles.

What's your TA? A high TA will also pull pH up.

Maddie

 

[jblizzle]

Just to add, there's usually no need to try to keep the pH in that range. Anything in the 7s is fine. The higher it is the slower it will move. So you might find it is more stable at 7.8

 

[Nate1975]

Just to add, there's usually no need to try to keep the pH in that range. Anything in the 7s is fine. The higher it is the slower it will move. So you might find it is more stable at 7.8

Alkalinity is 150. There is lots of kids splashing and jumping in.

 

[JamesW]

Start working the TA down to about 60 to 80.

Drop the pH to 7.2 each time and the TA will drop a few points every time.

 

[Nate1975]

So just keep dropping the pH to 7.2 and that will lower TA?

 

[Richard320]

So just keep dropping the pH to 7.2 and that will lower TA?

Yep.

Plug your numbers into poolmath, get your dose, and then scroll to the bottom where it has Effects of Adding Chemicals. Plug the acid dose in and it'll tell you how much the TA will drop. One caution: the pH Effect will be wrong. It's only right within a very narrow set of parameters, so it's best to ignore that part.

 

[Oly]

Yes adding pool acid will drop your TA over time. Test your tap water for TA as you may be adding TA each time you top off your pool. Don't focus too much on a "good" TA number once it settles in between 80-120 you will find your pH will stabilize.