Pool tips
Expert pool tips, buying guides and how-tos from the Pool Wizard team.
Pool Chemistry
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Jul 1, 2024
Why is my pool water cloudy?
Cloudy water is one of the most common problems pool owners face, and you're not alone if you've wondered why it happens.
The causes range from chemical imbalances to filtration problems. Here are the usual suspects and how to get your water back to crystal clear.
The common causes
pH should sit between 7.2 and 7.6; outside that range water turns cloudy.
Alkalinity should be 80–120 ppm and calcium hardness 200–400 ppm.
Low chlorine lets algae and bacteria grow.
A dirty or clogged filter, or not enough pump run time each day, means the water isn't being cleaned properly.
Key points
Check pH: 7.2–7.6.
Check alkalinity and calcium hardness.
Keep chlorine at the right level.
Clean the filter and run the pump long enough.
Still cloudy? Bring a water sample to our Willawong shop for a free test, or book a service.
