Cloudy water is a symptom, not a diagnosis
Almost every Vegas pool goes cloudy at some point — and the wrong fix wastes money and makes it worse. Cloudy water comes from five very different problems, and the right move depends on which one you've got.
Before you pour anything in, run through the diagnostic order below. It takes ten minutes and tells you exactly what to do.
The five real causes (in order of likelihood)
In a typical Las Vegas pool, here's what cloudy water actually is — most-common first:
- Filter not running long enough or filter dirty — most common, especially after a dust storm
- Chemistry imbalance, usually high pH (above 7.8) causing calcium to fall out of solution
- Very fine dust from monsoon or wind — particles smaller than your filter can catch in one pass
- Early algae bloom — water looks dull and slightly green-tinged before it turns full green
- Calcium hardness too high (over 500 ppm) — water saturates and turns chalky-cloudy on its own
The 10-minute diagnostic
Work through these steps in order:
- Test free chlorine, pH, alkalinity, calcium. Write down all four — don't guess.
- Check filter pressure. If it's 8+ psi above clean baseline, the filter is your problem, not chemistry.
- Look at the cloudiness in bright sun: blue-white = chemistry/calcium; gray-tan = dust; green-tinged = early algae.
- Run the pump on high for 24 hours straight and re-test. If clarity returns, it was circulation/filtration.
- If pH is above 7.6, lower it to 7.2–7.4 with muriatic acid before doing anything else.
Match the fix to the cause
Once you know which it is:
- Filter issue: clean cartridges or backwash, then run pump 24 hours. Cloudy clears in 1–2 days.
- High pH: dose acid in 1-cup increments, wait 4 hours between adds. Calcium goes back into solution as pH drops.
- Fine dust: add a clarifier (PolyClear or similar) and run pump 24 hours. Clarifier clumps fines so the filter can grab them.
- Early algae: shock with liquid chlorine to 10 ppm at dusk, brush walls, run pump 24 hours. Re-test the next morning.
- Calcium too high: there's no chemical fix — you need a partial drain and refill to dilute the calcium.
What not to do
Don't dump shock the moment the pool goes cloudy. Most cloudy pools in Vegas aren't algae — they're chemistry or dust. Shocking high-pH water makes the calcium precipitation worse and turns a 24-hour fix into a week-long mess.
Don't add 'clarifier' as a default. It works for fine dust but does nothing for chemistry imbalance, and overdose makes filters seize up.
When to call someone
If you've gone 5+ days, cycled the filter, balanced chemistry, and the pool is still cloudy — the issue is usually something you can't see from the deck: a failing cell, a partially blocked main drain, a CYA reading you didn't take, or scale inside the filter that's preventing real filtration.
At that point, a 30-minute diagnostic visit beats another $80 of chemicals. Our Weekly Cleaning visits include the same diagnostics every week so it never gets to this stage.
Want us to handle it?
We'll diagnose, dose, and dial in your pool — so you don't have to remember any of this.
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