Cloudy Swimming

Jun 17, 2019
7
Melrose, MA
Is this a mystery?
My 11,500 gallon plaster pool can be crystal clear until multiple people start swimming, especially at night.
I've done experiments where no one wearing sunscreen is allowed in, and still, incredibly cloudy.
When I turn the night light on the water reminds me of my Sea Monkey Aquarium from 1969.
I've tried fine nylon screens in the skimmer to remove oils, and Super Blue.
 
Clarifier, glue. TFP does not recommend the use of that except in very isolated cases.

Test results?
 
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