OMG, I am wading into the Deep End. I'm probably going to drown but here goes.......
Adding Cal-hypo is adding Ca(ClO)2, which reacts with the water H2O to get hypochlorous acid (HClO) which means there is leftover one calcium, one hydrogen and two oxygens. I haven't had chemistry since high school, but wouldn't that be calcium hydroxide or CaHO2? I don't profess to understand how sunlight breaks up HClO, but would not the end result of that process be calcium chloride, water and an extra oxygen which just bubbles out the surface? CaCl2 + H2O + O? Is this not the same calcium chloride that is "Calcium Hardness", which is required for concrete and plaster pools?
I am aware the cal-hypo increases pH and that it's the increase in pH which is what makes the water cloudy.
So, why don't we just "chlorinate" concrete and plaster pools with Cal-hypo all the time and use muriatic acid to keep the pH down?
Is the calcium hydroxide one of the hydroxides that balances Total Alkalinity?
I should just go ahead and inhale a lungful of water now and put me out of my deep end misery!