Vacuum Shock Time Release Tablets 6/Jar. The first stage in the Palmero 2-step system. Restores suctioning force and extends service duration of equipment. Ideal for monthly use to prevent detritus build-up. Optimizes the efficiency of vacuums. Ensures against hazardous chemicals. Vacuum Shock is a time-released tablet, the first part of the Palmero 2-Step Evacuation System Maintenance. It eliminates debris accumulations, reestablishes pressure, and prolongs pump life without the need for oxidizers, such as chlorine, bleach, peroxide, and iodine.