






💧 Elevate your soak with smarter, softer spa water—because your hot tub deserves the best!
The FROG Serene In-Line Cartridge Bundle includes one mineral cartridge lasting 4 months and three 200g bromine cartridges, designed for spas with built-in cartridge holders. This dual sanitizing system reduces bromine use by up to 50%, delivering cleaner, clearer, and softer water that’s easier on skin, swimsuits, and spa surfaces. Prefilled cartridges simplify maintenance by eliminating measuring and mess, while bromine’s slow dissolution ensures effective, low-odor sanitation.










| Brand | FROG |
| Item Weight | 2 Pounds |
| Item Form | Cartridge |
| Product Benefits | Maintains Clean Sanitized Water, Makes Water Clearer and Softer, Easier to Maintain |
| UPC | 722906005643 |
| Number of Items | 1 |
| Net Quantity | 1.0 Count |
| Manufacturer | FROG |
| Country of Origin | USA |
| Product Dimensions | 20.32 x 17.78 x 5.08 cm; 907.18 g |
| ASIN | B0CKFJN7PP |
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