SpaGuard Spa Shock (non-chlorine) helps spa owners to maintain crystal clear water by removing microscopic organic contaminants. No-chlorine formulation helps stabilize your spas pH level to prevent bounce. Spa Shock is compatible with @ease for Bullfrog Spas, as well as standard chlorine and bromine sanitation systems. Does not replace sanitizers or algaecides. Granulated. 35 oz. bottle. Active Ingredients: Potassium Peroxymonosulfate: 31%, Other Ingredients: 69%.