Uneven Carbonation & other Plaster Discoloration | Calcium Issues, pt. 5
When calcium hydroxide is drawn to the surface, it carbonates and turns white. We call this uneven carbonation, because it virtually never happens evenly across the entire pool. Eric discusses the two main causes of uneven carbonation.
Show Notes
00:00 - Intro
01:49 - Most people mistake this problem for scale. But it's not scale.
05:05 - This is a chemistry issue, not specific to brand of finish or pigment. This is not a cement or pigment failure, it's a water chemistry problem that can be prevented.
06:01 - How this occurs during plaster application, exposure and startup.
15:36 - How this occurs months or years later, from aggressive water over time.
21:04 - When we get calls about these issues, the answer is not always good news. We are not in the business of pointing fingers at who caused what.
25:45 - Two causes of etching: not diluting acid, and using trichlor feeders, especially on pools with auto covers.
28:35 - Summary. Thanks for listening!
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