You want to keep your chlorine at shock level until you can pass the 'overnight test.' Test your chlorine in the evening after the sun is off the pool. Then, test it again in the morning within an hour or so of sunup. If you have lost more than 1ppm of chlorine, then you are still fighting something in the water and need to continue to keep your chlorine high. Continue to do so until you don't lose more than 1ppm overnight and also have no greater than 0.5ppm of CC. While you are trying to clear the cloudiness, you'll want to run your pump 24/7 and clean your filter as needed.

After I wrote this, I realized I should have asked you what kind of test kit you are using. If you have not already done so, I would recommend you buy a Taylor K2006 or 2006C (better buy). You can get it through the test kit link in my signature below.

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