Is the LSI actually an "Index"? episode artwork

EPISODE · May 6, 2026 · 11 MIN

Is the LSI actually an "Index"?

from Rule Your Pool · host Eric Knight

[00:00] - Intro [01:44] - Wójtowicz Update to the LSI Formula [04:21] - Dr. Langelier's Original Index Formula [05:56] - What water wants vs. What air wants [08:18] - Closing   ______________________________Connect with us! Realize your full potential.Watershape University®Water chemistry questions?Orenda®Questions? Comments? Or apply to sponsor the show:[email protected] Facebook: @ruleyourpoolYouTube: @rule-your-pool 

Episode metadata supplied by the publisher feed · Published May 6, 2026

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A listener emailed the old ruleyourpool email address (the new one is [email protected]) and brought up something interesting. He said "Nowhere in your RYP podcasts have I heard you mention that the LSI is not an index. It's a delta between the saturation pH and the current pH. LSI is the difference between the pH you have and the pH your water wants." Let's discuss this.

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Is the LSI actually an "Index"?

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