FROG® Serene Bromine Cartridge | In-Line Spa Systems Brand_Watkins Wellness fastest hot tub maintenance task

fastest hot tub maintenance task with the biggest return — and most people skip it for months

Your filter is the most overworked part of your spa

and a damaged cartridge filters poorly and fails early

the super compact Ooni Koda is good to go in seconds

We didn't think so

FROG® Serene Bromine Cartridge | In-Line Spa Systems Brand_Watkins Wellness fastest hot tub maintenance taskThe FROG Serene Bromine In Line Cartridge is the bromine releasing cartridge for spas equipped with the FROG Serene In Line System FROG's bromine based water care line, built directly into the spa's filter compartment. It's the consumable that does the daily sanitizing work, releasing a steady, low level of bromine to keep your water clean and clear between water changes. For spa owners who prefer bromine over chlorine, Serene delivers the same "set