Green-to-clean costs at a glance
The price to recover a green Northridge pool depends almost entirely on how far it's gone. A pool with a light green tint is a chemical-and-labor job; a black swamp or one that needs draining is a much bigger undertaking. These are realistic 2026 ranges:
| Severity | Typical cost |
|---|---|
| Light green / slight tint | $250 – $350 |
| Deep green / cloudy | $350 – $500 |
| Black / swamp (can't see the bottom) | $500 – $800+ |
| Drain & acid wash | $800 – $1,500+ |
Rule of thumb: if you can still see the bottom of the pool, it's usually a chemical recovery in the $250–$500 range. Once the water turns opaque and you can't see the floor, budget for the higher tiers — and if algae has stained the plaster or the water is beyond balancing, a drain and acid wash may be the only real fix.
What drives the cost
Several factors decide where your job lands in the range:
- Severity. The single biggest lever. A light tint clears with shock and filtration; a swamp needs repeated dosing, heavy brushing, and days of running the filter.
- Pool size. More gallons means more chemical and more labor to turn the water over — the oversized estate pools common in Sherwood Forest and Porter Estates cost more to recover.
- Filter condition. A clogged or undersized filter slows everything down. Recovery often includes a full filter clean or a cartridge swap.
- Whether a drain is needed. If the water is too far gone to balance, or algae has stained the plaster, draining and acid washing adds significant labor and cost.
- The Valley heat. Northridge's intense central-Valley sun speeds algae regrowth, so a recovery has to outpace the bloom — sometimes meaning stronger initial dosing to get ahead of it.
Process & timeline
A typical green-to-clean runs 2 to 5 days. It starts with testing and balancing, then a strong shock treatment, thorough brushing of walls and floor to break algae loose, and continuous filtration to clear the dead algae out of the water. Cloudy and swamp-grade pools usually need a second round of shock and a filter clean partway through. The water clears in stages — green to cloudy gray-blue to clear — so don't panic if it looks worse before it looks better.
Preventing the next one
Green pools in Northridge are almost always a chlorine-management failure during a hot stretch. The cheapest fix is never letting it happen: consistent weekly service keeps chlorine and stabilizer in range so the water can't bloom. A single recovery often costs more than a couple of months of regular service — which is exactly why prevention wins.
Get a firm green-to-clean quote
Every green pool is different, and a photo or two tells us most of what we need to scope it. We'll assess the severity, tell you honestly whether it's a chemical recovery or a drain job, and give you a firm price before any work starts.
Northridge Pool Service FAQs
How much does it cost to clean a green pool in Northridge?
Most green-to-clean jobs run $250–$500. A light tint is at the low end; a deep green, cloudy pool sits near the top. Black swamp pools and ones that need draining and acid washing cost more — often $500 to $1,500+ depending on size and plaster condition.
Can a green pool always be cleared with chemicals, or does it need draining?
If you can still see the bottom, it's almost always a chemical recovery. Once the water is opaque, or algae has stained the plaster, a drain and acid wash may be the better fix. We assess before quoting so you only pay for what the pool actually needs.
How long does green-to-clean take in Northridge?
Usually 2 to 5 days. Light cases can clear in a couple of days; swamp-grade pools need repeated shock, heavy brushing, a filter clean, and several days of running the filter to clear the dead algae.
Why did my pool turn green so fast?
Northridge's intense central-Valley heat burns off chlorine quickly, and once it bottoms out, algae can bloom in just a few days during summer. Hard LADWP water and heavy tree debris speed it along by consuming chlorine even faster.
How do I stop my pool from going green again?
Consistent weekly service is the real prevention — it keeps chlorine and stabilizer in range so algae never gets a foothold. A single green-to-clean often costs more than a couple of months of regular service, so staying on schedule is the cheaper path.
Get a free Northridge pool quote
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