Pool Ninjas specializes in rescuing green, cloudy, and algae-infested pools throughout Nashville, Brentwood, and Middle Tennessee. We'll assess your pool and get it swim-ready as fast as possible.
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Coming home to a green pool is one of the most frustrating things a pool owner can face — especially after a vacation or a few weeks of neglect. Green water means algae has taken hold, and depending on the severity, it can take multiple treatments and visits to fully resolve. Pool Ninjas has handled hundreds of green pool rescues across Nashville, Brentwood, and Middle Tennessee.
Most green pool rescues take 3–7 days depending on the severity of the algae bloom. Severe cases may require multiple treatments. We'll give you a realistic timeline after assessing your pool — no surprises.
The best way to prevent your pool from going green again is consistent weekly pool cleaning. Many of our best customers came to us first through a Green-to-Clean rescue. We offer weekly pool cleaning service in Nashville, Brentwood, Mt. Juliet, and Lebanon — keeping chemistry stable week after week so algae never gets a foothold again.
Green-to-Clean pool service throughout Middle Tennessee — see our city-specific pages for local details:
Most green pools are swim-ready within 3–5 days. Lightly green pools (early algae bloom, still somewhat clear) can clear in 24–48 hours. Severely green or black pools may need 5–7 days of treatment and multiple filter cycles. We'll give you a realistic timeline after seeing the pool — every situation is different.
Green-to-clean service starts at $150–$300 for a standard pool with light algae, and $300–$600+ for heavily green or black-algae pools. Cost depends on pool size, severity, and chemicals required. We charge chemicals at retail price — no markup — which saves you significantly on the chemical-intensive treatments green pools require. Call (629) 249-1872 for a free estimate.
Green water is almost always algae caused by insufficient chlorine — either the sanitizer ran out, the circulation system wasn't running enough, or a heavy rain diluted the chemistry. Black algae is a more stubborn strain that embeds into plaster. Green pools also happen after a period of neglect, equipment failure, or after heavy pollen or storm debris loads the pool faster than the filter can handle.
Rarely. We use an aggressive shock-and-algaecide treatment combined with thorough brushing and filter cycling to kill algae without draining. Draining is usually only necessary for severe black algae that has embedded deeply into plaster, or when the water chemistry is so far out of balance that correction isn't cost-effective. We'll always try the treatment approach first.
Yes — the best prevention is consistent weekly maintenance. Once your pool is clean, we can enroll it in our weekly service starting at $75/week. Weekly visits keep chlorine levels consistent, catch early algae growth before it becomes a problem, and monitor equipment so circulation issues don't let algae take hold. Pools on our weekly plan essentially never turn green.
Green algae is free-floating or lightly attached and responds quickly to shock treatment — typically 2–3 days to clear. Black algae forms hard, root-like structures embedded in plaster or grout and requires aggressive brushing plus specialty algaecide over 5–7+ days. Black algae is far more stubborn and may require repeated treatments. If you see dark spots on plaster rather than uniform green water, call us immediately — black algae is easier to beat when caught early.