King Technology Spa FROG Serene Cartridge Refill Kit | 4-Piece Bundle | 01-14-3856

The complete, hassle-free maintenance bundle designed to keep your hot tub crystal clear and incredibly soft for months. The King Technology Spa FROG Serene Cartridge Refill Kit is formulated to work seamlessly with both the Spa FROG Floating System and factory-installed In-Line systems. By combining active purifying minerals with a low dose of slow-dissolving bromine, this system kills bacteria two ways, resulting in "Fresh Mineral Water" that feels amazing on the skin and completely eliminates the harsh chemical odors associated with traditional spa care.

The 01-14-3856 kit provides exactly what you need for a fresh spa drain-and-fill cycle: one long-lasting mineral cartridge and three pre-filled bromine replacement cartridges, ensuring you spend your weekends actually enjoying your hot tub rather than playing chemist.

Features

Complete Refill Bundle: Includes 1 blue FROG Serene Mineral Cartridge (which lasts up to 4 months) and 3 yellow FROG Serene Bromine Cartridges (each lasting 2 to 4 weeks depending on use), providing a comprehensive, multi-month chemical supply in one convenient package.

Up to 50% Less Bromine: Because the active minerals do a significant portion of the sanitizing work, this system requires up to 50% less bromine than standard hot tubs. Enjoy your soak without the dry, itchy skin, faded swimsuits, or overpowering chemical smells.

Pre-Filled & Mess-Free: Say goodbye to measuring messy powders, breathing in toxic dust, or handling raw chemical tablets. These cartridges come completely sealed and pre-filled. Simply adjust the dial to the correct setting for your spa size and click them into place.

Dual-Action Sanitization: Works by actively killing bacteria two different ways. The proprietary minerals condition the water and help keep the pH neutral, while the very low level of bromine provides a steady, reliable, and easily regulated sanitizing barrier.

Universal System Compatibility: Designed to snap perfectly into the reusable Spa FROG floating holder, as well as factory-installed In-Line feeder systems found on major luxury hot tub brands like Caldera, Marquis, Emerald Spas, and more.

Specs