SilkBalance™ is a unique revolutionary watercare system, automatically balancing and keeping water in its original pure state. It’s an easy and simple method that gives you the assurance of the best possible water quality day after day.” Just Shake and Pour “ a dose in once a week. Each premixed bottle contains everything required to maintain your HotSpring Spa for 4 months. SilkBalance™ for Spas is specially formulated to be soft on your skin and keep water crystal clear and fresh without harmful chemicals.