Yes, good catch Kurt. I hadn't been really following this thread but when I saw cloudy and cal-hypo and suggesting swimming at 20ppm...well, I had to look.

Quite frankly, I would NOT swim when keeping the pool at shock levels. If you look at Ben's writing, he's kind of iffy about it. What he's very CLEAR about is that higher levels of chlorine aren't an issue if they are the residual level for the CYA put you there--if your CYA is 120 and your FC is 12, go swimming. But at shock levels? I don't think that's what he meant.

I noticed the calcium level wasn't posted. I'll bet it's now through the roof. Each time you add a mass of Cal-hypo you may get clouding. If that IS the cause and NOT an excessive calcium level then a good dose of muriatic acid should clear it.

Meanwhile, switch to bleach/liquid chlorine instead.