- Jul 17, 2019
- 3,793
- Pool Size
- 13000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Overnight Chlorine Lost Test. Details are below, but chlorine is only used up by the sun, and algae/bacteria. With the OCLT you taking out the sun factor by testing after sundown and before sunup, so that you can see exactly how much chlorine is being used up by the algae/bacteria in your pool. If you lost more that 1 FC from sundown to sunup, we typically recommend a SLAM to kill the nasty stuff in your pool.
Edit - Newdude beat me to it.
Edit - Newdude beat me to it.
Perform the Overnight FC Loss Test (OCLT)
The Overnight Chlorine Loss Test tells if the SLAM is finished or if you need to start a SLAM. This article says how to do the OCLT.
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