For the hot tub owner who would like to deep dive into water balance, the best approach is the Langelier Saturation Index, LSI.
Simply put, the LSI is a formula developed from studies conducted by Dr. Wilfred Langelier in the early 20th century and is the basis for water balance and saturation.
FROG® offers more in-depth information on the LSI – check it out if you’re interested. FROG makes water care easy, you don’t have to be a backyard chemist to take good care of your pool.
If you have questions, we’re happy to help. And you can always check the FROG Water Care app for solutions too, it’s available 24/7.