TFP Web Pool Calculator Vs App Calculator

[jseyfert3]

I think my log sharing is on. I guess at the TA number if the test colors begin to change but have not fully made the cross over. I zero in on the CSI to avoid the white line at the water line. And to protect the pebble tech walls of the pool from too much acid. So, I am over thinking it?

The correct way to do the TA/CH test is to add drops until the last drop doesn’t change the color further, then don’t count that drop.

Stopping when the color first starts changing under-measures the TA by 1-2 drops.