Things seem to be getting better....as follows: using only bleach liquid.
FC: 21
pH: 7.6
cya: 160

As predicted FC drops quite slowly due to stabilizer levels, even with +100* temps & 90* water temps...

A couple questions on testing w/ K-2006...

Seems a waste w/ high FC to use even 10ml level in test, so w/ 5ml test sample, is it right to count drops as actual 1=1 PPM FC? I realize accuracy would depend
on guesstimate on 5ml...

Additionally, when testing pH...sample colors change...ranging up in surprising short time frame...7.3 to 7.6 in 5 minutes. Significance, if any?

Thanks again for the most valuable assistance!