All pools and spas need maintenance. We at Hines Pools & Spas are here to help you determine just what kind and amount of maintenance your pool or spa needs. Our handy calculator will take you step by step how to figure out amounts of chemicals needed to keep your pool or spa crystal clean. All you need are the dimensions of your pool and spa.
To determine the proper amount of chemicals to use for your pool, you will first need to calculate how much water it holds. Use these pool volume calculators to find the volume of your pool.
Langelier Saturation Index
The Langelier Saturation Index (LSI) is a formula developed from studies conducted by Dr. Wilfred Langelier in the early 20th century. The LSI is the basis for water balance and saturation, and this article will try to explain how it works in a simplified way. This is complex science, but very helpful to know as a pool owner or operator. See this page on one of our partners, Orenda Technologies, on how to calculate the LSI for you pool. Calculate LSI
Add only if Total Alkalinity is above 100 ppm.
Lowering or raising pH:
If pH is too high and alkalinity is correct:
Proper Chemical Levels
Free Chlorine: 1-3 ppm
Total Alkalinity: 100-120 ppm
Calcium Hardness: 200-250 ppm
pH Range: 7.2 - 7.6