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Sorry about the typo. Its total chlorine that is 11.0, not combined chlorine. My mistake. My chlorine levels have dropped a little with the storms lately, and with the predictions of 1 to 2 more inches of rain, I very well may have to shock again. I will be using bleach instead of cal hypo this time though.
Have you tried shocking your pool up to 20ppm and keeping it there for a few days? If it got HAZIER after the rain, it's sounding like algae.
I shocked it today. 20ppm is what I usually raise it to during shock, but then I usually let the level drop back to normal range. I've never tried to keep it at that level for an extended period of time. I'll try it this time.
Here's an update for my situation. I shocked at 20 ppm, as recommended, for 3 days. The pool cleared a bit more. The aeration method seems to have worked a bit too. The ph did rise but alk rose very little, if at all. I kept adjusting with muriatic acid, as recommended. I put in a little clarifier, once my levels were back to normal, and presto, after a day, the water was crystal. Has been since. Here are my present numbers from this afternoon:
PH 7.2
TA 130
CH 300
FC 12
TC 12
CYA 45
Thanks again for the replies and help!
Good Job! Now you can bring your FC down to the 3 to 6 level and it should hold.
And you can enjoy your pool!