Swim spas require similar treatment to ‘portable’ spas, just on a larger scale. SpaPure Stain & Scale for SwimSpas, a specialized concentrate designed to reduce scale formation and prevent staining or water discoloration, even from source water. Specifically formulated for larger volumes, this product allows you to treat swim spas without using up a whole bottle, unlike when treating typical spa volumes of 250-500 gallons. Proudly made in the USA.