I'll spare you the details but I let my chlorine levels get too low and my water got a little cloudy so I'm currently in day 2 of my very first SLAM.
When I started the SLAM and added the liquid chlorine (8.25% jugs), as the chlorine would go into the water, the chlorine would immediately turn the surrounding water very cloudy. I've never seen chlorine do this before in my pool when I add it directly to the water. I also purchased 10% chlorine and it did the same so I can rule out a bad batch of chlorine.
After adding the chlorine needed to reach shock level per the Chlorine/CYA chart, the pool turned a solid white. I could not even see the main drain in the deep end.
I assume the "white cloud" is the result of the chlorine immediately oxidizing some organics? Is there any other water chemistry variable that may cause chlorine to behave this way (I think really high CH may do this but I'm not sure).
Since adding chlorine is turning the water so cloudy, I last added chlorine via the skimmer since I have my pool heater isolated (via pool valves) and no pool water is currently circulating through the heater.
The overall cloudiness of the water has improved since yesterday when it turned so white. This morning, I can now see the main drain although the water is still very cloudy. The filter has been running 24/7.
Here are my TFT-100 numbers as of a few minutes ago when I last tested.
pH: It was 7.2 when I started the SLAM
SALT: 3800 (My SWG calls for 4000ppm so this is close enough)