Description
FROG Serene In-Line System Cartridge 2-pack – 1 Mineral Cartridge (Blue) plus 1 Bromine 200g Cartridge (Green) – Free Shipping
These cartridges are designed for use either in the FROG Serene floating system or the FROG In-line Cartridge Holders installed on select Marquis Spas, Artesian, Caldera Spas and Hot Spring Spas.
Transform your spa experience with the FROG Serene In-Line System, a premium water care solution designed specifically for select Marquis, Artesian, Caldera, and Hot Spring Spas. This innovative system combines the power of bromine and mineral technology to deliver crystal-clear, gentle water with minimal maintenance.
What's Included:
- 1 Bromine Cartridge
- 1 FROG Sanitizing Mineral Cartridge
- Compatible with Hot Tubs that have built in FROG cartridge holder systems
Key Benefits:
- Uses up to 50% less bromine compared to traditional systems
- Gentler on skin, hair, swimsuits, and spa surfaces
- Dual-action sanitizing through minerals and bromine
- Helps maintain balanced pH levels
- Significantly reduces water maintenance time
Easy Installation & Maintenance:
The system features a convenient prefilled, adjustable cartridges for effortless water care. The Bromine Cartridge lasts 2-4 weeks while the Mineral Cartridge provides up to 4 months of continuous water conditioning.
Superior Water Quality:
Unlike traditional chlorine systems, FROG Serene's bromine-based formula dissolves slowly in hot water, providing more consistent sanitization with fewer odors. The mineral technology actively conditions your water, creating a softer, more enjoyable soaking experience while helping to maintain optimal pH levels.
Perfect For:
Hot tub owners seeking a low-maintenance, skin-friendly water care solution that delivers premium results without the harsh effects of traditional sanitizers.
Note: Please verify compatibility with your specific spa model before purchase.




