Spa Frog Jump Start – 1.5 oz x 12 by King Technology

This convenient and effective spa start-up hot tub shock comes in an easy to pour packet, with a unique effervescent feature so you know it’s working. Its bubbling action properly shocks your hot tub water and sets the initial chlorine level on freshly filled spas up to 500 gallons; and for SPA FROG Mineral System users, it helps extend the life of your bromine cartridges. Simply open and pour the hot tub shock package into your spa when starting up a freshly filled hot tub (approximately every 4 months).