Don’t let algae or harmful bacteria get in the way of having a good time in your spa or hot tub — go with SpaBoss’ Chlor-Aid. This stabilized, granular chlorine is perfect for use in your spa or hot tub’s water. Once added, this product gets to work disinfecting your spa hot tub immediately. And, SpaBoss Chlor-Aid will not affect your spa’s alkalinity, pH levels or create scale buildup in any way.