Calculator for hot tub, spa and pool owners to take the guesswork out of how much of each chemical you should be adding. The calculator will correctly work out doses for Calcium, raising and lowering alkalinity and pH, and adding the correct amounts of sanitizer and stabiliser.
Also includes water balancing feature to allow you to calculate your pools or hot tubs Langelier Saturation Index (LSI) to help maintain an efficient and smooth running system.