Spa Frog

This product offers a convenient supplement to standard spa sanitization methods. It allows you to keep a lower residual level of bromine (1-2 ppm) or chlorine (0.5-1 ppm) in your spa without sacrificing healthy, clean water. It fits neatly inside the filter cartridge for easy installation, lasts up to 4 months and includes a convient "reminder dial" which reminds you when to replace it.