Do hot tub mineral sanitizers actually work? Mineral systems use elements like silver and copper to kill bacteria and algae, but you'll still need to add some chemicals to make sure they work properly. With a mineral sanitizer, you'll need a lot less chlorine or bromine. just 0.5 or one part per million. They're easy to add to your hot tub and the water feels gentler, but because they use elements like copper, it can cause stains or green water and you'll still need to balance and adjust your alkalinity.

And pH and add chlorine or bromine to your water. So if you already have high metal content in your water, this can cause extra staining issues. But a mineral sanitizer is great for most hot tub owners.