Green-to-clean cost at a glance
The biggest factor is simply how far the algae has progressed. A pool that's tinged green is a fast job; a black swamp where you can't see the bottom is a different scope entirely. These are realistic 2026 ranges for the Granada Hills area:
| Severity | Typical cost |
|---|---|
| Light green (water still clear-ish) | $250 – $350 |
| Deep green / cloudy (floor not visible) | $350 – $500 |
| Black / swamp (heavy algae, debris) | $500 – $800+ |
| Drain & acid wash (beyond chemical recovery) | $800 – $1,500+ |
Rule of thumb: if you can still see the bottom of the pool, you're usually in the lower half of the range and chemical recovery will work. Once the floor disappears under green or black water, expect the upper end — and in the worst cases a drain and acid wash, which is priced as its own job.
What drives the cost
Five things move the number:
- Severity. The single biggest factor — how much algae, how cloudy, how long it's been neglected.
- Pool size. More gallons means more shock, more clarifier, and more filter cycles to clear.
- Filter condition. A green pool quickly clogs a cartridge or DE filter; recovery often needs a full filter clean, and sometimes a cartridge replacement.
- Whether a drain is needed. If algae and stabilizer are too far gone to balance chemically, a partial or full drain and acid wash is the only path — and that's the priciest scenario.
- The heat. Granada Hills' hot foothill summers speed algae regrowth, so a recovery started promptly costs less than one that's been fighting the heat for weeks.
The process and timeline
A typical green-to-clean takes 2–5 days. We test and balance the water, apply a strong shock and algaecide, run the filter aggressively, and brush the walls and floor to break the algae loose. As the dead algae clears, we vacuum it out — sometimes to waste — and clean the filter, repeating the cycle until the water is clear and chemistry holds. Most cases reach swim-ready water in 48 to 72 hours; heavier blooms need a second shock and an extra day or two, and the worst need the drain-and-acid-wash route. We quote the full scope before starting, so there are no surprises.
Preventing the next one
Green-to-clean is almost always cheaper to avoid than to fix. Consistent weekly service keeps chlorine in range and phosphates down so algae never gets a foothold — which matters in Granada Hills, where canyon debris and foothill heat give algae every advantage. The cost of one recovery typically exceeds several months of weekly maintenance.
Get a firm green-to-clean quote
Every green pool is different, and a few photos usually tell us most of what we need. We'll assess the severity, confirm whether chemical recovery will work or a drain is needed, and give you a firm written price before any work begins.
Granada Hills Pool Service FAQs
Why did my Granada Hills pool turn green so fast?
Warm water plus organic debris is the recipe. The foothills' long, hot summers keep the water warm enough for algae to bloom in days once chlorine drops, and Bee Canyon winds feed the water phosphates from chaparral, dried grass, and cottonwood debris. Miss a week in the wrong stretch and a clear pool can go green quickly.
Can a green pool always be cleaned with chemicals, or does it need draining?
Most green pools recover with a shock-and-filter chemical process. Draining and acid washing is reserved for the worst cases — black swamp water, extremely high stabilizer, or staining that chemicals can't reach. We assess which path your pool needs and tell you before starting, since a drain is a more involved, higher-cost job.
How long does a green-to-clean take in Granada Hills?
Usually 2–5 days, with most cases swim-ready in 48 to 72 hours. Light green clears fastest; deep green or cloudy water needs several filter-and-brush cycles and sometimes a second shock. The summer heat that helped the algae bloom also speeds regrowth, so starting promptly keeps both the timeline and the cost down.
Is it cheaper to fix a green pool or prevent it?
Prevention, almost always. A single green-to-clean recovery typically costs more than several months of weekly service. Consistent chemistry and phosphate control keep algae from ever taking hold, which is the cheapest path in a debris- and heat-heavy area like Granada Hills.
Will my filter survive a green-to-clean?
Often yes, but a green pool loads a cartridge or DE filter heavily, and recovery usually requires a thorough filter clean. If the cartridges are old or already degraded, the algae load can be the last straw — we'll let you know if a replacement is the smarter call rather than fighting a tired filter.
Get a free Granada Hills pool quote
Licensed, insured, and local. A real written quote — no obligation.