Advice from your local pool service company
Cloudy water is a symptom that needs a complete diagnosis
Cloudiness can come from suspended debris, early algae, low sanitizer, incorrect pH, high calcium, poor filtration, weak circulation, a dirty filter, recent chemical additions, or heavy swimmer use. More than one cause may be present.
The first steps are to test the water, confirm the pump and filter are operating, inspect pressure and flow, and review recent events. Adding random clarifiers without correcting the cause can waste time and load the filter.
Do not swim when visibility is poor enough that the bottom or a person in the water cannot be clearly seen. Restore safe visibility and water conditions before reopening the pool.
Items to compare
- Test sanitizer, pH, alkalinity, and related values
- Check circulation and filter pressure
- Review recent rain, heavy use, or chemical additions
- Brush and inspect for early algae
- Use clarifier or specialty treatment only when appropriate
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Frequently asked questions
Will running the filter clear a cloudy pool?
It may help if chemistry is corrected and the filter is functioning, but filtration alone will not solve every cause.
Can a cloudy pool be safe to swim in?
Poor visibility is a safety concern, and cloudiness may indicate inadequate sanitation. Wait until visibility and water conditions are restored.