There are many different kinds of spa chemicals on the market. We recommend that you ask your Diamante Spas dealer for advice. Most dealers have the knowledge and experience with spa chemicals and water conditions in their areas. They know what spa chemicals will and will not work with certain water. Also, we recommend that you do not buy or use chemicals purchased at home improvement stores or discount outlets. The salespersons of these stores do not know about the adverse affects or reactions you or the spa may have with these chemicals. Always purchase chemicals that are made for acrylic spas