Quick answer: After a storm, first remove debris, test pH and sanitiser, clean the filtration and let the water filter intensively for several hours.
A storm can upset a pool faster than normal use. Dust, pollen, leaves and organic debris enter the water, and rainwater can shift the pH. If heat, weak filtration or low disinfection are added to the mix, a green tint appears very quickly.
Why the water deteriorates after a storm
It’s not just about the rain. Wind and runoff from the garden carry nutrients for algae and fine debris into the pool, which puts a strain on both filtration and disinfection.
- organic debris consumes disinfectant
- fluctuating pH reduces chlorine efficiency
- pollen and dust promote cloudiness
- warm water speeds up algae growth
What to do after a storm
Start mechanically. Skim out leaves with a net, clean the skimmer and the pump’s pre-filter. Only then measure and adjust the chemistry.
- test pH and free chlorine
- adjust pH according to the chemicals used
- backwash or clean the filter
- let filtration run longer than usual
- if the water starts turning green, follow the algae guide
When to be extra cautious
If the water is cloudy and green, you are probably dealing with a biological problem. If it is clear but coloured, metals from the source water may be involved.
Where to go next
This text is original editorial content by Spa Pool News. It serves as a practical guide for pool, hot tub and wellness owners; always follow the manufacturer’s instructions and the recommendations of your service company for specific equipment.
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