The primary cause of cloudy pool water is usually caused by too much chlorine in the pool which has set the PH level above 7.8.
Pool pH that is too high (above 7.8) can cause the following:
Cloudy pool water
Decreased ability for chlorine to kill germs
Damage to a pool’s vinyl liner
Dry, itchy skin, rashes and brittle hair
Mineral scaling inside your pipes, which can reduce circulation and strain your pump
What Happens If your Pool pH Is Too Low?
When your pool pH level is too low (below 7.2) you can experience the following:
Irritated eyes and mucous membranes of swimmers
Damage or dimpling of your pool’s plaster finish
Corroded metal parts such as ladders or diving board bases
Corroded pumps and mechanical systems Chlorine instability and overuse