SpaPure Chlorinating Granules are a fast-dissolving, concentrated chlorine sanitizer for hot tubs and spas. The active ingredient is sodium dichloro-s-triazinetrione (dichlor) at 97% — a granular form of chlorine that dissolves quickly, works across a wide pH range, and won't cloud your water the way some sanitizers do. Sanitizer is the single most important part of spa water care. A hot tub is warm, agitated, and used by people at close quarters — ideal conditions for bacteria. Chlorine is what keeps that water safe to soak in, neutralizing bacteria continuously between uses. Let your chlorine drop and the water can turn cloudy, develop an odor, and stop being sanitary; keep it in range and the water stays clear and worry-free. These granules are the everyday workhorse of a chlorine-based spa: you add a small dose regularly to hold a steady residual, and the same product doubles as a shock treatment at a higher dose when the water needs a reset. Pro Tip: Add your chlorine in the evening after the spa has been used, with the pump running and the cover open for 15 minutes. Dosing after use replaces the chlorine that bathers just consumed, and adding it at night lets it work while no one's soaking — so the water is balanced and ready by morning. Brand SpaPure®
