Green Pool Cleanup San Antonio

Why pools go green in San Antonio

Green pools are not a moral failing. In South Texas they happen fast, for reasons that are mostly out of your control.

Heat and UV. San Antonio summers burn through chlorine quickly. Miss a week or two of chemical care in August and algae moves in.
Equipment failures. A pump that stops circulating, a salt cell that died, or a filter clogged solid leaves water unfiltered and untreated.
Storms and debris. Heavy rain washes organic material and phosphates into the pool, and a week of neglect after a storm is all it takes.
Vacant homes. New purchase, rental turnover, or a pool nobody watched for a month. The most common green pool we see.
Chemistry drift. High stabilizer (CYA) makes chlorine ineffective. Owners keep adding chlorine that cannot work, and the water keeps getting greener.

Whatever caused it, the fix is a process, not a single bag of shock. Here is ours.

Our green-to-clean process

1. Assessment and water test

We test the water fully, check the equipment, and look at the pool's condition. A light green pool with working equipment is a different job than a black swamp with a dead pump. You get an honest quote for your situation before we start.

2. Physical cleanup first

Leaves, branches, and debris come out by hand and net. Dead algae and sludge get vacuumed to waste, not pushed through the filter. Skimmer and pump baskets get emptied and cleaned.

3. Shock and algae treatment

We hit the water with the right shock dose for the severity, add targeted algaecide when appropriate, and run the pump around the clock. This is the kill phase: the water goes from green to cloudy gray-blue as the algae dies.

4. Filter work, repeatedly

Dead algae clogs filters fast. We clean or backwash the filter multiple times through the process, sometimes daily. This step is why DIY green-to-clean attempts stall: the filter cannot keep up without constant attention.

5. Balance and polish

Once the water clears we balance chlorine, pH, alkalinity, and stabilizer to proper ranges, brush the walls and steps to remove dead algae film, and vacuum one last time.

6. Hand it back, and keep it clean

You get a swim-ready pool with a full chemical report. Then we talk about weekly service so it never goes green again. Most cleanup customers roll straight onto a weekly plan.

How long it takes and what it costs

Typical timelines

Light green, equipment working: 2 to 3 days.
Dark green, equipment working: 3 to 5 days.
Swamp, or equipment problems: 5 to 7 days or more, depending on what needs fixing.

These are realistic ranges. Anyone promising a one-day miracle on a black swamp is skipping steps you will pay for later.

Cost factors

Green pool cleanups in San Antonio typically run $300 to $800, depending on:

Severity. How green, how much debris, how long it has sat.
Filter condition. Some cleanups need new filter media or a rebuild.
Equipment repairs. A dead pump or broken salt cell adds to the job.
Pool size. More water means more chemicals and more time.

You approve the price before we start. No open-ended billing.

Keeping it from going green again

A cleanup fixes the water. Prevention fixes the cause. The most common prevention plan is simple:

Weekly professional service. Consistent chemistry, brushing, and equipment checks are what keep algae away in Texas heat. From $230/month.
Keep the pump running enough hours. Undersized run times are a top cause of recurring algae. We set proper schedules for your pool.
Watch stabilizer levels. High CYA is the silent cause of repeat green pools. We test it on every visit.
Do not let it sit. Leaving for the summer? Put the pool on a service plan while you are gone instead of coming home to a swamp.

Green pool questions

Can I swim in a green pool?

No. Green water means active algae and unknown bacteria levels. It is also hard on skin and eyes. Wait until the water is clear and chemically balanced, which is exactly what the cleanup process delivers.

Should I just drain the pool and start over?

Rarely. Draining is usually more expensive than treating, and in San Antonio an empty pool in summer heat can damage plaster and even let the shell shift or pop in high water table areas. Treatment is the safer path in almost every case.

Will my filter survive a green pool cleanup?

Usually, yes. Cartridge and DE filters handle cleanups well with repeated cleaning. Sand filters sometimes need new media after a severe case. We inspect your filter during the assessment and tell you upfront if it needs work.

How do I stop algae from coming back?

Consistent weekly chemistry, proper pump run times, a clean filter, and managed stabilizer levels. That is the whole formula. Our weekly service covers all four.

Get a free quote

Tell us about your pool. We usually respond the same business day.

Green Pool Cleanup in San Antonio