Pool Math website and phone app not giving same results

Jul 21, 2017
9
Hickory, NC
Just a quick question- Wondering why the Pool Math website and the phone app do not match on how much to add to reduce or increase a certain chemical. For example, my current PH reading is 8.2 and I need to reduce it to 7.6 by using Muriatic Acid 14.5%. The website says to use 56 oz. , the phone app states 51 oz.
The chlorine currently reads as 4 but if I wanted to increase to 7 (as an example); the website states 124 oz. of 5.7% bleach, the phone app states 103 oz.
I want to be as accurate as possible but did not know which one to go with. Apologies if this is posted in the incorrect thread. Thank you in advance for information on which calculator to use. Screen Shot 2019-05-14 at 7.06.51 PM.png
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On the two your numbers aren’t matching,

For the pH difference make sure your TA levels are inserted the same. It looks like on the webpage you've got 80 while on the App you’ve got 100. TA plays a part in calculating the total.

As for FC, on the webpage you’re using 4ppm to 7ppm while on the App you’re at 4.5ppm to 7
 
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