Go ahead and run the CC test and report your value. That can help us determine if your algae is all dead or if you are still fighting something in the water.

The overnight chlorine demand test is another way we determine if you are still fighting something. Test your chlorine this evening (also do the CC test at this time). Then, add bleach to get back to shock level (based on your CYA level -- look at the Best Guess Chlorine Chart in my signature). An hour or two later, retest the chlorine and make note of the reading. Then, in the morning within an hour of sunrise, recheck your chlorine. Report how much chlorine you lost overnight and if there is any CC reading.

Basically, you want to keep your chlorine high until you can do two things.
1. Go from sundown to within one hour of sunup without losing more than 1ppm of chlorine
2. Have no more than 0.5ppm of CC.

Once those two conditions are met, we usually advise keeping chlorine high for one additional day and then let it drift down and keep it between the minimum and maximum per the Best Guess Chart.