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It\\u2019s been a while since it was just the two of us on an episode.\\xa0\\xa0 To fix that, I am only answering questions from the Scaling UP! Nation, for the whole episode.\\xa0 No guest, no rant from the host, just your questions.\\xa0 Truly, the show for you, by you.\\xa0

LSI, RSI, PSI

Can you tell us more about LSI, RSI and PSI?\\xa0 (1:04)

LSI, RSI and PSI are all scaling indices.\\xa0 Each tells us whether the water is scaling or non-scaling.\\xa0\\xa0\\xa0 Not if the water is scaling or corrosion.\\xa0 ALL water is corrosive.

In 1936, Wilfred Langelier developed a calculation for predicting the pH at which water is saturated with calcium carbonate called pHs.\\xa0 The \\u201cSaturation pH\\u201d is the first step in all scaling indices.

Saturation pH (pHs):

12.3-(log CaH + log Malk + (0.025xC\\u02da) - (0.011x\\u221a)

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