Privista™ PRU35070 2 lb Premium Shock 12 per Case. A periodic shock treatment designed specifically for the Pristiva system and salt pools. Ideal for use whenever a shock treatment is required for a salt pool. Premium shock is a formulated shock that also includes clarifiers and other water enhancers. Also used for application immediately following a Pristiva Primer addition as part of the Pristiva system for salt pools. Ideal for pool opening and closing.