Hot Spring does not recommend using any type of oils or bath salts in your spa because they tend to gum up the filters and damage the electrical components in the spa. Using these products does not void the spa’s warranty, but any service needed to repair the spa because of damage caused by the use of non-approved chemicals is not covered by the warranty. Those can be expensive repairs, so if you’re not sure, ask your dealer before you use any new chemical or oil in your spa.