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Reviewed by Marcus AldridgeSenior Editorial Reviewer — Plumbing, HVAC & Wet Trades

Who to call · Pool & Spa Technician

Pool water turning green? Here's Who to Call

Green pool water is caused by algae growth, typically from insufficient chlorine levels, poor filtration, or unbalanced pH. While mild cases can be treated with shock treatment and brushing, severe algae blooms may require professional intervention including draining, acid washing, and chemical rebalancing. A pool technician can restore water clarity and set up a maintenance plan.

What's going on

How to fix pool water turning green

Some "pool water turning green" cases look simple, but getting it wrong almost always costs more than calling a pro: hidden leaks, fire risk, code violations, and insurance headaches. A licensed pool & spa technician will diagnose the exact cause, use the right professional tools, and stand behind the repair. Most local pros offer free quotes and can visit the same day or the next.

Who to call

Pool & Spa Technician

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Symptoms to look for

  1. 01

    Pool water has turned green, cloudy, or dark — you can't see the bottom

  2. 02

    Green or black algae visible on pool walls, steps, or floor

  3. 03

    Chlorine levels test near zero despite recent addition

  4. 04

    Strong musty or swamp-like odor coming from the pool

FAQ

Frequently asked questions

Who should I call for: Pool water turning green?

Call a licensed pool & spa technician. Pool & Spa Technicians have the specialized training, tools, and insurance to diagnose pool water turning green safely and stand behind the fix. Most offer free quotes and can visit the same day or the next.

Can I fix this myself?

Some minor cases can be handled DIY, but most require a licensed pool & spa technician to avoid costly rework and safety risks. A free quote takes under a minute.

How fast can a pro come out?

Most pool & spa technicians offer same-day or next-day visits for non-emergency issues. True emergencies (burst pipes, gas smell, no heat in winter) are typically handled within 1–4 hours.

How much does it cost to fix?

Costs vary by severity and your location. Submit a free quote request to get real pricing from local pros in your area.

What are the signs of: Pool water turning green?

Pool water has turned green, cloudy, or dark — you can't see the bottom. Green or black algae visible on pool walls, steps, or floor. Chlorine levels test near zero despite recent addition. Strong musty or swamp-like odor coming from the pool.