B,
The only reason I brought up the schedules is that I thought they might be the reason for your cell not producing the amount of chlorine it should. But your schedules looks good, so there has to be a reason that your FC did not increase when running 24/7.
What is your CYA level?
I doubt that you have algae already, but you never know.. I suggest that you run an Overnight Chlorine Loss Test (OCLT) just to make sure. It just means you have to get your rear out of bed when it is still dark..
Overnight Chlorine Loss Test
Thanks,
Jim R.