Sutro DOES work with saltwater pools. As you're going through setting up your pool (or spa) profile, we will collect information on whether you have a saltwater pool or a regular chlorine pool.
After selecting salt water in your pool & spa profile the option to select saltwater generator will be available for the primary sanitizer. Select a secondary sanitizer that you use other than the saltwater chlorine generator. Chlorine recommendations provided will incorporate the primary sanitizer of your choosing.
When chlorine recommendations are given, you will want to check your saltwater chlorine generator settings and adjust as needed.
In addition, sometimes your water could use the additional chlorine to catch up to the chlorine demand. Consider following the Sutro recommendation and adding the recommended chlorine selected as the secondary sanitizer. Saltwater chlorine generators do not make chlorine quickly, so giving your chlorine a quick boost may prevent potential issues.