The Langelier Saturation Index (LSI)

If you divide up pool chemistry, there's really two subcategories of it. There is sanitization (which is water, clarity, cleanliness, and safety) and there is balance. Is your pool scaling, etching, filled with calcium dust or crystals? All of those problems are LSI violations. They can be completely prevented simply by balancing the LSI and keeping it balanced. Following the conventional wisdom of range chemistry doesn't guarantee that you will have balanced water. But following the Langelier Saturation Index does. In the first three episodes, Eric and Jarred covered Total Alkalinity and pH. Those are two of the six factors of the Langelier Saturation Index (LSI). In Episode four, they cover the rest of the LSI and what you need to know about it. The LSI is the objective measure of water balance. Eric and Jarred will talk about what that means. There are six factors, and they will tell you what you need to know about all of them.

Rule Your Pool · Jarred Morgan, Eric Knight