Sani Marc Summer Smiles 29-07047-01 1kg Spa Soft Water Softener and Conditioner improves water quality and bather comfort. It balances the pH of spa water to boost the effectiveness of sanitizers. It also protects spa surfaces from corrosion and is compatible with all types of sanitizer. SPA SOFT increases the solubility of salts in water, leaving water clearer, cleaner and softer to the skin. Its pleasant scent enhances the sense of relaxation.