CE-SPA is a chitosan-based clarifier blended with CV-600 enzymes, specifically formulated for hot tubs and spas. The enzymes remove non-living organic waste and oils; the chitosan attracts particles to be filtered out. Removing organic waste is our Second Pillar of Proactive Pool Care. CE-SPA Clarifier, like all Orenda Products, is all-natural: no synthetic polymers or dyes. Hot tubs and spas have warm, agitated water. Normally those conditions cause excess bubbling and sometimes foaming with Orenda enzymes like CV-600 or even CE-Clarifier. CE-SPA was formulated specifically for these conditions to minimize the foaming and still deliver the results needed for clean water.