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Shocked the pool last night and took a reading of my chlorine levels this morning. To my surprise I had a reading of FC of 2.0. it was quite a drop from last night but it is the first time in a week that I was able to obtain a reading in the morning.

I will follow your shock procedure for the next couple of days and let you know how it goes. Thanks for all the good advice

Sorry about the typo but my pool volumne is 18.500 gals. My test kit does test for combined chlorine. The first test is for Free Chlorine, then for Total Chlorine TC-FC=CC , 0-0=0. After I shock the pool I will get a high reading on the test kit but in the mroning when I test for FC TC and CC...

Combined chlorine is also unreadable. There is no smell of chlormaines. Where is the shock process mentioned above, thanks

I have had a problem this year maintaining any type of FC levels in my pool. I have shocked and overshocked my pool in the evening and by morning my FC levels are at 0. I also run the filter 24 hrs with 3 in tabs in the skimmer and still there is no FC readings. I have been using quite a bit of...