Maxi Doser AWC Saltwater Reservoir Level

Hello,

I am currently running an auto-water-change system with a Maxi Doser stand-alone. I currently take out water simultaneously so that my sump water level does not change using a timer. I'd like to implement an alarm for when my saltwater reservoir is empty using a float switch that will halt water changes. Is there a way to do this without slaving the Maxi to the Profilux?

Thanks.