Cloudy, Milky Water

There are four possibilities - your test kit will help you to decide which the culprit is

1st possibility - suspended particles give a milky white discolouration

This is likely to be caused by precipitation of dissolved minerals as a result of high pH

Cure: - Reduce the pH

To lower pH by 0.2 add Hydrochloric Acid at a rate of 1 litre per 50 m³ of pool water

Run the pump for 4 hours after dosing then test again

Repeat until correct reading is reached

 

2nd possibility - dirt or bather pollution build up due to low chlorine or poor filtration

Cure: - backwash the filter, Superchlorinate to 10ppm and then Flocculate

 

3rd possibility - the levels of stabiliser (cyanuric acid) are too high. The chlorine takes longer to kill organisms, which can then proliferate and lead to haziness in the water

Cure: - Replace some of the pool water by draining to waste (or carry out an extra-long backwash), top up with fresh water, then Superchlorinate to 10ppm

 

4th possibility - ineffective filtration

Cure: - Check clean the filter and check the filter media in a sand-filter; replace if necessary

Change the sand-filter contents every 4 years (or every 7 years if using Zeolite)

 

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Ken Walker - MyPoolGuru©