Frog Serene Spa Bromine Cartridge, Yellow

FROG Serene Spa Bromine Cartridges (Yellow) make hot tub care simpler by delivering a steady level of sanitation with less work and fewer chemicals. Designed for use with the FROG Serene Floating System, they help keep your spa water clean, clear, and comfortable while reducing the amount of bromine you need. These pre-filled bromine cartridges work together with FROG Sanitizing Minerals to create “Fresh Mineral Water,” which kills bacteria using a low, consistent level of bromine. This mineral-plus-bromine approach can cut bromine use by up to 50% compared to standard spa sanitizer levels while still maintaining effective sanitation.

Key features and benefits

Designed specifically for use with the FROG Serene Floating and In-Line Systems for worry-free integration with your existing setup.
Provides adjustable, consistent bromine delivery that typically lasts 2–4 weeks per cartridge, depending on spa size and bather load.
Helps maintain cleaner, clearer, and softer-feeling water when used with FROG minerals, making soaking more comfortable for skin and eyes.
Pre-filled, no-mess cartridges eliminate the need for manual measuring or handling loose bromine tablets.
Easy end-of-life handling: simply discard or recycle the empty cartridge as directed once it is depleted.

Usage notes
Set the cartridge dial according to your spa’s gallon capacity and adjust as needed over the first week to maintain a bromine level of about 1.0–2.0 ppm. Always balance pH, total alkalinity, and hardness first and shock the spa regularly as part of your ongoing water care routine.

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