Silkbalance is a unique watercare system, a balancing product product that helps keeps your spa in its original pure state. It's an easy and simple method that gives you the assurance of the best water quality day after day. "Just Shake and Pour" a dose in your spa once a week. Each premix bottle contains 76 fl oz. Enough for four months with the aveage spa. Silkbalance for Spas is a revolutionary patent pending hottub watercare formula.