Spa Frog Bromine Cartridge
More spas are now coming with built in Spa Frog in-line systems, including Marquis Spas, Caldera Spas & Emerald Spas. This cartridge will work with in-line systems, and also the Spa Frog floating system.
The bromine cartridge will last 2-4 weeks depending on the size of your spa and usage level.
For the mineral cartridge, see related items below.