Episode 25: Pool Plaster Mottling: Causes, Chemistry, and the Real Fix |The Pools Scientific Podcast
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Episode 25: Pool Plaster Mottling: Causes, Chemistry, and the Real Fix |The Pools Scientific Podcast
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Pool plaster mottling is one of the most common complaints in new pool construction, and the industry's standard explanation, installer error or bad water chemistry, is usually wrong.
The real cause is calcium hydroxide migration during cement cure, and it has been a solved problem in commercial concrete construction since the 1950s. The pool industry just never picked it up.
This episode covers the full mechanism: how Portland cement produces calcium hydroxide as a hydration byproduct, why it migrates to the surface, what it does when it gets there, and how the LSI determines whether your water is accelerating that process or allowing the plaster to stabilize.
The fix exists. It's documented. It's been in use in other industries for decades. This episode explains why your pool contractor has almost certainly never mentioned it.
Show notes and free resources at PoolsScientific.com. Subscribe to the weekly email list for episode updates. Ebooks available at payhip.com/poolsscientific. Follow us on Instagram @poolsscientific24. The Pools Scientific Podcast is produced by Pools Scientific LLC — Elevated Pool Care Through Science and Technology.