I have a few unrelated questions that all deal with chlorine:
1- To get a more accurate total chlorine reading via an OTO test, can I dilute my test water with distilled water? For example, if I dilute it at a 1:5 ratio and the diluted sample shows 2.0 ppm in my test, my total chlorine level is 10.0, correct?
2- Since CYA binds 97% of the chlorine in the pool, does it release some of its bound chlorine when the active chlorine (or free chlorine) level drops? In other words, is there a chemical equilibrium that comes into play here? Does CYA-bound chlorine effectively act as a "chlorine reservoir" to replenish the active chlorine as it is used up by the sun or while sanitizing / oxidizing organics?
3- What's the difference between Free Chlorine and Active Chlorine? Are they the same thing? Are they both measured in ppm?