Quick answer: Cosmetics and sunscreen strain the water, form an oily film and clog the filter. A shower before swimming, longer filtration and regular filter cleaning help.
In summer, a large amount of cosmetics ends up in the pool. It is not just about aesthetics; oils and emulsifiers worsen filtration, promote foam and increase disinfectant consumption.
How cosmetics show up
An oily ring at the waterline, foam, a dirtier filter and a worse feel of the water are typical. In hot tubs the problem develops faster because of the warm water.
- oily film at the waterline
- foam under flow
- clogged filter
- higher chemical consumption
- odour or reduced clarity
Prevention
The cheapest measure is a shower before swimming and a sensible filtration schedule after a busy visit.
- shower before entering
- do not let freshly applied people into the water right away
- clean the filter more often
- skim debris off the surface
- check the values after a large visit
When to tackle the water more intensively
If the water foams, smells or feels oily even after filtration, a partial water replacement and a thorough filter clean may be needed.
Related guides
This article is original editorial guidance by Spa Pool News. For chemicals, electrical equipment and service work, always follow the manufacturer’s instructions and safety recommendations.
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