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Why weather causes chemistry drift
Rain dilutes chemistry, heavy sun increases chlorine demand, and hot weekends increase contaminant load. These changes compound quickly when they happen together.
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48-hour pre-weather checklist
- Confirm free chlorine is near the upper end of your safe operating band
- Verify pH is not already trending high before storms or high bather load
- Clean skimmer and confirm circulation is ready for debris-heavy periods
- Pre-stage any products you commonly use so corrections are timely
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Post-weather recovery without overcorrecting
Retest first, then correct in phases. Avoid stacking large chemical changes in one pass unless water safety requires urgent action.
Next step
Use weather-aware guidance in SwimKeep
Check forecast impact alongside your readings to choose smaller, better-timed adjustments.