Simple - Safe - Effective Natural Hot Tub Water Care. SilkBalance patented Natural Once-Per Week formula will make your hot tub water silky and your skin feel soft. SilkBalance hot tub water care will help to keep the pH & alkalinity balanced and will make any sanitizer work better. Your water will sparkle and have a Fresh Glacier Water scent. BONUS: Our formula is 100% safe for you, your children and gentle on your hot tub components and parts. Great Water Made Easy with SilkBalance for Hot tubs and Spas.