Pool Math app incorrect suggested amount

[keenest]

The pool Math app is recommending that I add 7.4oz of 20 baume acid to bring my pH to 7.5 from 8.6. This is obviously incorrect. See the attachment.

 

[Leebo]

How many gallons do you have your pool size set to? Also it appears your TA level is entered at zero, make sure that level is entered correctly.

 

[keenest]

Indeed it was the missing TA. Once I entered that it recommended the proper amount of acid.