Spa Frog Serene® (Bromine) Cartridge - Yellow 5.3 oz

The Spa Frog Serene® (Bromine) Cartridge is for use in the Serene In-Line or Floating system for hot tubs and spas.

Size: 5.3 oz

The Serene (Bromine) cartridge is the active sanitizer in this system. Use in combination with the Spa Frog blue Mineral cartridge, found here.

If you want to buy more than one yellow Serene cartridge at a time, check out the Spa Frog Serene® (Bromine) Combined Cartridge Pack for savings!  

Please Note: Spa Frog makes Serene Bromine cartridges in yellow, green and purple. These cartridges are interchangeable. The purple and green are high capacity 7.1 oz / 200 gram cartridges which contain 33% more bromine than the yellow 5.3 oz cartridges.