2) Spa Frog 01-14-6012 Hot Tub Mineral Jump Start Shock Chlorine Packets (Pair)

Effective spa start-up in an easy to pour packet, with a unique effervescent feature. Its bubbling action properly sets the initial chlorine level on spas up to 500 gallons and helps extend the life of your bromine cartridges. Each Packet is 1-1/2 ounces. How It Works Made specifically for starting-up a freshly filled spa, FROG Jump Start is a one-dose-fits-all shock product that dissolves quickly - thanks to its effervescence. It creates a start-up level of sanitizer that can be used to help find the right setting for the bromine cartridge (see manual for instructions). 1 Packet for spas up to 500 gallons, every 4 months, when draining and refilling spa 1 buy = 2 packets!