Serene in-Line Cartridges for Hot Tubs That Have Built in Cartridge Holders, FROG Serene Mineral Cartridge + 3 Bromine Cartridges (200 Grams)

Description

💧 Elevate your soak with smarter, softer spa water—because your hot tub deserves the best!

The FROG Serene In-Line Cartridge Bundle includes one mineral cartridge lasting 4 months and three 200g bromine cartridges, designed for spas with built-in cartridge holders. This dual sanitizing system reduces bromine use by up to 50%, delivering cleaner, clearer, and softer water that’s easier on skin, swimsuits, and spa surfaces. Prefilled cartridges simplify maintenance by eliminating measuring and mess, while bromine’s slow dissolution ensures effective, low-odor sanitation.