Frog? @Ease? in-Line Mineral Cartridge + 3 in-Line SmartChlor

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.Frog? @Ease? in-Line Mineral Cartridge + 3 in-Line SmartChlor