Report Salt System For Spa in Portable Hot Tubs & Spas Posted December 16, 2014 I have been considering a salt system for my spa. Obviously my main concerns are about corrosion. One thing I do not understand is how quickly do they make chlorine? If I have a light bather load during the week, and a heavy bather load during the weekends is it easy to adjust these systems to compensate up or down for chlorine demand? And how quickly do they respond? Does anyone have any experience with the saltron mini?