I have been passing on my new found knowledge of TFP to a neighbor of mine with an above ground pool.
He thinks I am nuts for how much bleach he is buying.
Here are the test results.
24 foot round
13,000 gallons
100 pound sand filter
CYA 40
PH 7.5
TA 140
CH 150
FC 16.5 (33 drops)
CC 0
Passed...