fc level

The pool servicer came yesterday to do the startup for salt. How long does it take for it to start producing chlorine? I tested today (24 hours later) and had 0 FC. Do I need to supplement with liquid chlorine right now until the SWG catches up and is producing enough?

I have a gunite pool around 45,000 gallons. My CH was sitting around 225-240 for a week or so. I added around 40 lbs of calcium chloride. Chlorine was at a 6 (CYA 50). This was tested & added when the sun was setting. The next morning chlorine was completely gone. This has also happened once...

I SLAM'ed my pool about a month ago and it's been looking great. I've always read that you should add chlorine to the pool at night so that the sun doesn't burn it off and it can effectively kill the organics. I understand that all of that makes sense when you are trying to get rid of an algae...