Mineral Cartridge Replacement Compatible with Frog @Ease in-Line Mineral Cartridge System for Marquis, Caldera, Artesian & Hot Springs Spas CYA Free, for up to 600 Gallons (2 Pack)

Maintaining clean, balanced spa water becomes noticeably easier with this compatible mineral cartridge replacement for the Frog @Ease in-line system. Designed to fit Marquis, Caldera, Artesian, and Hot Springs spas, the cartridges slide into place without fuss and begin working right away. The CYA-free formulation is a major advantage, helping prevent stabilizer buildup that can dull water clarity and complicate sanitizer effectiveness over time. Rated for up to 600 gallons per cartridge, the two-pack provides solid value and extended coverage, making routine maintenance more predictable and less frequent. Performance-wise, the water feels consistently clear and fresh, with reduced chemical odor compared to traditional sanitizer-only setups. The cartridges help stabilize sanitizer demand, which can translate to fewer chemical adjustments week to week. The only minor drawback is that longevity can vary depending on bather load and water conditions, so heavy spa use may shorten the replacement cycle. Even so, for spa owners seeking a dependable, low-maintenance mineral solution that integrates seamlessly with the Frog @Ease system, this two-pack delivers excellent results and convenience worthy of a five-star rating.

They work at the should. Recommend replacing every 2 months. Easy to use. Must be combined with the chlorine inline cartridge.

These work great and just as they should, should put a new one in every 4 months or so. Combine with Inline Chlorine cartridge.

Perfect fit and works well in the spa. Easy to install, easier than the old style cartridge and much cheaper in cost.