I've read and read and read through pool school and all the various posts. I just want to make sure I've got this straight. My current test results, FC 8, pH 7.7, TA 70, CH 350, CYA 35. I've got a Stenner set up for my bleach. It currently doses 77.2 oz of 10% bleach each day split over 4 dosings at 6 am, 10 am, 2 pm, and 6 pm. Over the course of the last 5 days I get a consistent reading of FC at 8 ppm at around 8:30 in the morning. So it seems things are in balance. I'm dosing enough chlorine to keep the FC pretty much consistent throughout the day. From using pool math it seems I'm burning off about 4.6 ppm of FC over a 24 hour period each day. I realize 8 ppm FC is high based on the CYA/FC chart but I've also read that it won't hurt anything.
Now, I'm about to raise my CYA to 50 and plan to keep my FC at 8 ppm still. If I'm understanding all this correctly the result should be that I need to add less bleach every day once my CYA gets to 50, correct? So if I keep my current dosing schedule but raise CYA to 50 will I see that my FC climbs steadily each day past 8? Maybe from 8 to 9 to 10 etc?
I figure that with a CYA of 35 and the chart recommending a minimum FC of approximately 2.5 (I know it's not linear) it must mean that about 2.5 ppm of FC is bound to the CYA and therefore isn't available to sanitize. So if I raise my CYA to 50 the minimum FC target is 4 which I again assume means 4 ppm is bound to the CYA and therefore isn't available to sanitize. So why by raising my CYA should I expect to see less FC being lost each day?