SPA FROG Serene Replacement Bromine & Mineral Cartridge Kit

spaSpa Frog Serene Cartridge Replacement Kit - 3 month supply. Includes 1 Blue Mineral cartridge and 3 yellow Bromine cartridges. Helps to cut down on bromine use and alleviate daily maintenance. Your spa water will feel softer with a crystal clear shine. Cuts down bromine use No daily maintenance or measuring chemicals Water feels softer with a crystal clear shine Spa Frog's FROG Serene Bromine Cartridge provides spa and hot tub owners utilizing the Spa Frog System with an easy way to introduce bromine sanitizer into their systems in a self-contained cartridge, eliminating the need for measuring. Each FROG Serene bromine cartridge lasts 2-4 weeks. Bromine Cartridge effectively kills bacteria, reduces lingering odors, and removes other contaminants while providing a more comfortable environment for bathers. This product is designed for use with Spa Frog Serene floating and inline systems, and provides your hot tub or spa with everything it needs to run at optimal performance. Spa Fro