FROG @Ease Mineral Cartridge + SmartChlor Cartridges for Marquis, Caldera, Artesian & Hot Springs Spas - Hot Tub Sanitizer, CYA Free, for up to 600 Gallons

For use only in certain hot tub models: Artesian Elite, Artesian Island (optional on Artesian Island Elite and South Seas); Marquis Crown (optional on Marquis Elite, Vector and Celebrity); Caldera Vacanza; and Hot Spring Hot Spot.. Includes 1 Mineral Cartridge that lasts 4 months plus 3 FROG @ease SmartChlor Cartridges, each lasts up to 3-4 weeks depending upon hot tub size and usage; ideal for 600 gallon hot tub.. Eliminates organic contaminants 2 ways with a low level of chlorine and FROG Sanitizing Minerals.. Uses up to 75% less chlorine* and maintains a consistent low Free Chlorine level.. FROG Sanitizing Minerals condition the water for softness, help keep pH balanced, and absorb acids, all while helping eliminates organic contaminants and taking the pressure off of chlorine.