Spa Frog Mineral Conditioning 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 mineral cartridge will last 3-4 months, and is replaced when you drain down and refill your spa.
For the bromine cartridge, see related items below.