What causes cloudy pool water
- Very fine particles below about 0.5 micron that pass through the filter.
- High pH or high alkalinity. Total alkalinity above about 120 ppm makes further additions cloud the water.
- Dead algae left suspended after treatment.
- Too little filtration or a dirty filter.
How to clear it
- Test pH and total alkalinity; correct them first (pH guide).
- Clean the skimmer baskets and backwash or clean the filter.
- Dose Pool Clear clarifier: 1 litre per 1,00,000 litres. Pour around the periphery and agitate to mix.
- Keep the pool out of use for 3 hours.
- Run the filter for 4–6 turnovers so the clumped particles are removed, then re-test.
Pool Clear is an organic polymer clarifier. It gathers microscopic particles into clumps the filter can remove, so you can clear milky water without shock dosing or draining the pool.
Cloudy after an algae treatment?
Dead algae often leaves the water hazy for a day or two. Finish the algae routine with a clarifier dose and extra filtration.
Common questions
Why is my swimming pool water cloudy even with chlorine?
Common reasons are very fine particles the filter can't catch, high pH or alkalinity, dead algae and insufficient filtration. Test and balance the water, then use a clarifier.
How much clarifier should I use?
Chemtex Pool Clear is dosed at 1 litre per 1,00,000 litres of pool water, poured around the edge and mixed in.
How long does it take a clarifier to work?
Keep the pool out of use for 3 hours and run the filter for 4 to 6 turnovers; most pools clear within a day.
Do I need to drain the pool if the water is milky?
Usually not. Correct the pH and alkalinity, clean the filter and use a clarifier.
Products used in this guide
Need help with dosing for a hotel, club or society pool? Call +91-90739-38217 or contact us. Delivery across India, dispatched within 24 working hours.