InSPAration Spa aromatherapy crystals are a ready to use blend of aromatherapy crystal specifically formulated for Spas, Hot Tubs and Jetted Baths. Enhanced with Vitamins, Minerals and Natural Extracts, inSPAration"s special formula leaves skin soft and tired muscles rejuvenated. Masks chemical odors and will not stain or harm woods, fiberglass, acrylics, or plaster. Has no oils and will not clog filters or affect water chemistry.