Pool Math App and adding chlorine

5odaw1s

Active member
May 6, 2019
40
Gainesville Georgia
Couple of examples of adding chlorine from the FC section on the overview page.

Using Gallon jugs of 10% pool chlorine in 29000 gallon pool.

Example 1:
CYA = 30
FC = 2
Target FC would be 4

To add 2 ppm of 10% chlorine the app says:
Add 74 oz
OR 2quarts, 1 cup and 2oz
by volume to reach your target


Example 2:
CYA = 40
FC = 2.5
Target FC would be 5

To add 2.5 ppm of 10% chlorine the app says:
Add 93oz
OR 3 quarts
by volume to reach your target

In the first example, 2 quarts, 1 cup, 2oz is 72oz, not 74

In the second example, 3 quarts is 96oz, not 93

what am I missing?
 

5odaw1s

Active member
May 6, 2019
40
Gainesville Georgia
I do see the bigger picture. The app ha been this way since I installed it. I was just asking a question. I’m anal that way and I’m sure someone here can explain the discrepancy.
Edited by Moderator.
 
Last edited by a moderator:

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
31,356
Laughlin, NV
Once you get to larger quantities of chlorine, the app simply rounds to a reasonable amount.

Also, 2 quarts, 1 cup, 2oz is 74 oz.