QULV Hot Tub in-Line Replacement Chlorine Cartridge for use with Frog Ease in-Line System up to 600 gallons; No Cyanuric Acid, 3-Pack

For use only in certain hot tub models up to 600 gallons: 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 3 Smart-Chlor Cartridges. Each Cartridge lasts up to 4 weeks depending upon hot tub size and use; ideal for hot tubs up to 600 gallons

Seamless Compatibility – Works exclusively with the Frog Mineral Cartridge for quick and hassle-free installation

Simple Installation ＆Effortless Use: Compatible with Frog Floating Cartridges for an easy setup. Just flip and replace when needed—ideal for first-time hot tub owners or those who want a no-fuss maintenance solution

With the system, you shock only once a month, or when draining and refilling your hot tub – that’s so much easier than shocking after every use – it saves time and the frustration of constant shock treatments