Spa Choice Clear & Sparkle is specially formulated for hot water treatment. Clear & Sparkle neutralizes and removes dirt, soap, oils and suspended particles for crystal clear spa water. Using Clear & Sparkle allows your filter to operate at peak efficiency. Clear & Sparkle is fast acting and compatible with chlorine, bromine, ozone and biguanide sanitizers. For natural, clear water in your spa or hot tub, this product aids in the removal of particles too small for the filter to remove. This product works on dirt, organics and oils to rapidly clear your spa.