Why Is My Pool Cloudy?
Cloudy water usually means something has changed with filtration, circulation or water chemistry, or algae is starting to grow. Start by thinking about what changed, then get the water tested.
What might be behind it
Zodiac Australia's pool FAQ lists filtration, low circulation, water chemistry and algae as possible causes. More than one can be involved, and you can't tell which just by looking.
Think about what changed recently. A storm, a busy weekend of swimming or a pump that's been switched off are all worth noting.
Simple checks you can do
Look for leaves and other debris in the skimmer basket and on the pool floor. Watch for signs of poor flow, such as weak water movement at the returns.
Get the water tested before adding products. The results can help you decide whether to look at the filter, circulation or water balance first.
Stay out until you can see the bottom
The US CDC's healthy swimming guidance suggests checking that you can see the drain at the bottom of the deep end. Cloudy water can be a warning sign.
If you can't clearly see the bottom, keep everyone out of the pool. Clear water doesn't guarantee a pool is safe to swim in either, so testing still matters.
If the water keeps turning cloudy, regular maintenance can help catch changes earlier.