Pool water turned green after vacation — San Francisco, California
Returning home to a pool full of green, murky water is one of the most common shock-and-treat scenarios. Algae blooms develop quickly when the pump is off or chlorine drops to zero for even a few days—warm temperatures accelerate the problem. The fix starts with brushing the walls and floor, then a triple- or quadruple-dose chlorine shock (bring free chlorine to 30 ppm for green, 40 ppm for dark green or black). Running the pump 24/7 while the chlorine works, backwashing or cleaning the filter frequently, and adding clarifier or flocculant to capture dead algae are all part of the recovery process. A pool technician can perform the shock treatment, test and rebalance pH, alkalinity, and CYA levels, and have the pool swim-ready in 2–4 days.
Who to call
For this problem in San Francisco, call a: Zwembadtechnicus
Vind een Zwembadtechnicus in San FranciscoSymptoms to look for
- Pool water is bright green, dark green, or blackish-green instead of clear blue
- Water is cloudy or murky and you cannot see the pool floor
- Slimy green film on pool walls, steps, or floor when touched
- Strong musty or swamp-like odor coming from the pool
- Pool filter pressure gauge reads higher than normal due to algae clogging
Spoeddienst in San Francisco
Emergency home services in San Francisco are available 24/7 at premium rates — expect $150–$300+/hour for after-hours plumbing or electrical, the highest tier in the US. Response times average 45–90 minutes given hilly terrain and parking scarcity. Always verify an active CSLB license and proper DBI permits.