that's very interesting. So since HOCL is actually what kills algae, is it better to run at a higher FC level hence a higher HOCL? in my case of CYA of 50-60 my FC should be say 5-9 from Pool Math. There is significant difference between the HOCL numbers in fact looking at the chart I see number in blue and green do we want to keep it in the blue at all times? I am asking because the way I am running the stenner, I put the chlorine at after midnight to bring it up to 9, then I lose approx. 4PPM a day so I run it for 4 30 minute cycles(a 30 minute run adds 1PPM.) from reading this I should be at 9-10 PPM in the morning then add 1PPM every couple hours to maintain the 9-10 PPM. Or should it be even higher and then let it drop below 10 for PH and TA testing. I do follow the pool math numbers but I have algae sometimes on a couple walls where it may not be getting circulation as well. Also pool seems to pop more at higher numbers maybe letting it get down to the minimum every day should be avoided.
Bottom line should we all be adding during the day to maintain the upper end of pool math for FC? To me that seems the case as there is more HOCL and I know that gives a better kill rate for organics.