OCLT

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Well-known member
Jun 1, 2017
61
Dunn, NC
What would cause my Chlorine reading to go up overnight doing the OCLT. At 11:00 I took a reading off 22.5 . Now at 5:45am the reading is at 25. Yes, abuse the FAS-DPD kit. New sand put in our filter before starting SLAM.
 

duraleigh

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Apr 1, 2007
34,244
Sebring, Florida
What would cause my Chlorine reading to go up overnight doing the OCLT.
Testing method error. There is a mistake somewhere in your technique. FC cannot EVER go up unless you added some FC. Was your SWG off?