Cloudy water after a refill: normal, or a problem?

Cloudy water in the days after a refill or an acid wash worries people more than it should. It is usually normal, usually chemistry, and usually clears itself with the filter running.

Why fresh water clouds here

Valley fill water is hard and unbalanced. It arrives carrying a lot of dissolved calcium and it is not at the pH or alkalinity your pool wants. Out-of-range water is the single most common cause of cloudiness, and high pH with high calcium hardness will cloud a pool on its own by pushing calcium out of solution.

Freshly washed plaster is chemically active. A surface that has just been acid washed is raw. It releases material into the water for a period and changes the chemistry while it does, which is why the first week after a wash needs attention.

The filter is doing a lot at once.

Dust. A windy day or a monsoon storm puts a measurable amount of fine material into an open pool, and fine dust is exactly what makes water hazy rather than dirty.

The order that clears it fastest

Sequence matters, and doing it out of order is why some pools stay cloudy for a fortnight.

1. Run the filter continuously. Not on a timer.
2. Total alkalinity into range first, then pH. Because alkalinity holds pH in place, fixing pH before alkalinity just sends you back to fix it again.
3. Then chlorine.
4. Then check calcium hardness. Very high on a fresh fill means cloudiness may persist, and the answer is managing the water rather than treating the haze.
5. Brush walls and floor daily, which puts settled material back where the filter can catch it.
6. Clean or backwash the filter once it has worked hard, then again a few days later.
7. Only then consider a clarifier or flocculant, and only on balanced water.

Aftercare on a freshly washed pool

The first week matters:

• Filter running continuously for the first few days.
• Test daily, not weekly. A raw surface moves the chemistry.
• Brush daily.
• Expect a dust film on the floor initially, and brush it rather than worrying.

Balancing properly in that first week is also what protects the new surface. Newly exposed plaster sitting in aggressive water etches, and nothing undoes a fresh wash faster.

When it is not normal

• Still cloudy after a week of continuous filtration and in-range chemistry.
• Cloudy and getting greener, which is algae. See pool turned green.
• High filter pressure or weak returns, which points at the filter.
• Milky white and unresponsive, which on a fresh fill often means calcium out of solution.

What it costs

From the pricing page.

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If a freshly washed pool is not clearing, call whoever did the wash first; a decent pro will walk the chemistry through on the phone rather than charging a visit for it. We cover Scottsdale, North Scottsdale, South Scottsdale, Paradise Valley, Fountain Hills, Cave Creek, and Tempe.