I just received the Taylor k-2006 test kit for a 12,500 gallon above ground, vinyl pool with SWG generator. Water is clear and beautiful. Not burning my eyes anymore. Test was performed at 9 AM when the SWG had been off for 16 hours. I'm concerned about water balance at the moment, not chlorine.
Calcium hardness 120 ppm
total alkalinity 130 ppm
combined chlorine 0 (but I used the smaller sample amount instead of the larger, more accurate amount & am not concerned about chlorine just now)
According to the test kit wheel, the saturation index is -0.1.
According to test kit booklet, I'm thinking I need to add a gallon of muriatic acid to bring total alkalinity down to about 80.
The booklet says 120 ppm calcium hardness is low, but TFP recommends 0-300 for a vinyl pool, so there's a conflict between the two recommendations.
I'll have to go purchase more CYA as I'm out. I am, however, surprised it is so low since I originally put in more than was called for but that was 4 weeks ago.
What's your opinion on these first test results?