Have an 9,000 gal lap,pool. Total free chlorine was 0.5 and added 2-1/2 lbs. granular shock. TFC level came up to 5. This morning it’s back to 0.5. Help!
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Please post a full set of water chemistry test results from a proper test kit. What test kit are you using?
I suggest you read through Pool School - Trouble Free Pool and even look at a few of our videos TFP-TV - Trouble Free Pool
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